Of those that were against policy, around 80% DID NOT KNOW
they were doing something against policy.
I'm pretty sure many of you here fall into that bracket.
The 20%? They're the sneaky ones
that are a big reason why Facebook dialled up their policy enforcement.
Important side note: Facebook are the landlords so despite the fact you and I HATE having to worry about policy compliance, if we want to advertise on their land, we gotta play by their rules.
1) Not Having 2FA
What: 2FA (2 Factor Authentication) is a security measure to ensure that you log in to new devices and locations through both password and one other means of identification.
Impact: Without 2FA I've seen accounts get hacked much easier which in many cases leads to profiles, accounts, BMs banned for misuse (i.e. the hackers advertise things against policy). Also, many personal profile bans are because you're logging in from multiple locations without 2FA which Facebook sees as suspicious
2) Rogue Admin & User Connections
What: Having people connected to your accounts or business managers that are connected to other accounts/BMs which have been banned or running non-compliant ads
Impact: Facebook can/do link activities and can shut down your 'legit' and 'white hat' operations so you'll rightly say you've done nothing wrong but Facebook see all
3) No Advertising Activity
What: Having active ad accounts (and now possibly impacting entire business managers) with NO ads running can create a ban
Impact: if you need more than one ad account, for example as a backup or planning ahead, if Facebook don't see activity in a period of time they'll ban it
4) Personal Attributes
What: Using copy in your ads that identifies people by a personal attribute
Impact: Facebook don't want you to know that YOU know so much about users so if you tell, they'll disapprove ads. Too many of these lead to an account ban
5) Non-standard Site Functionality
What: This is when your website is using (innocently or otherwise) things Facebook deem as suspicious like redirects, pop-ups and the way the site operates.
Impact: Facebook can actually blacklist your website. Don't forget they don't just look at ads, accounts, pages and profiles, they can also ban websites from being linked to from ads
6) Scaling Too Fast
What: You've launched a new ad account and you're excited to scale fast.
Impact: Although ad accounts now have spend limits, even beyond that scaling suspiciously fast can cause ad account bans
7) Multiple Country Logins
What: You've shared your personal profile to someone/people in different locations
Impact: Facebook can block your profile and ask for ID verification, which is a pain
8) Low Page Feedback Score
What: When your Page feedback score falls below 1 (out of 5) for pages over one year old and below 2 for pages under a year old (not many know this part)
Impact: You'll lose your ability to advertise because of poor quality feedback from your users
9) Using Personal Profiles for Business
What: Pages are created for generating business, personal profiles are not.
Impact: If Facebook identify you as using your personal profile (newsfeed, banner) to promote your business they can restrict your profile from running ads and/or ban your profile
There are many more reasons why accounts get banned.
About: 9) Using Personal Profiles for Business - I am confused, because how to create and promote BM without profile
You can go read them up on the Policy section - it's not a fun read but unfortunately you need to at least know the popular ban reasons to stand a chance
Any others you'd add?

they were doing something against policy.
I'm pretty sure many of you here fall into that bracket.
The 20%? They're the sneaky ones

that are a big reason why Facebook dialled up their policy enforcement.
Important side note: Facebook are the landlords so despite the fact you and I HATE having to worry about policy compliance, if we want to advertise on their land, we gotta play by their rules.
1) Not Having 2FA

What: 2FA (2 Factor Authentication) is a security measure to ensure that you log in to new devices and locations through both password and one other means of identification.
Impact: Without 2FA I've seen accounts get hacked much easier which in many cases leads to profiles, accounts, BMs banned for misuse (i.e. the hackers advertise things against policy). Also, many personal profile bans are because you're logging in from multiple locations without 2FA which Facebook sees as suspicious
2) Rogue Admin & User Connections

What: Having people connected to your accounts or business managers that are connected to other accounts/BMs which have been banned or running non-compliant ads
Impact: Facebook can/do link activities and can shut down your 'legit' and 'white hat' operations so you'll rightly say you've done nothing wrong but Facebook see all

3) No Advertising Activity

What: Having active ad accounts (and now possibly impacting entire business managers) with NO ads running can create a ban
Impact: if you need more than one ad account, for example as a backup or planning ahead, if Facebook don't see activity in a period of time they'll ban it
4) Personal Attributes

What: Using copy in your ads that identifies people by a personal attribute
Impact: Facebook don't want you to know that YOU know so much about users so if you tell, they'll disapprove ads. Too many of these lead to an account ban
5) Non-standard Site Functionality

What: This is when your website is using (innocently or otherwise) things Facebook deem as suspicious like redirects, pop-ups and the way the site operates.
Impact: Facebook can actually blacklist your website. Don't forget they don't just look at ads, accounts, pages and profiles, they can also ban websites from being linked to from ads
6) Scaling Too Fast

What: You've launched a new ad account and you're excited to scale fast.
Impact: Although ad accounts now have spend limits, even beyond that scaling suspiciously fast can cause ad account bans
7) Multiple Country Logins
What: You've shared your personal profile to someone/people in different locations
Impact: Facebook can block your profile and ask for ID verification, which is a pain
8) Low Page Feedback Score

What: When your Page feedback score falls below 1 (out of 5) for pages over one year old and below 2 for pages under a year old (not many know this part)
Impact: You'll lose your ability to advertise because of poor quality feedback from your users
9) Using Personal Profiles for Business

What: Pages are created for generating business, personal profiles are not.
Impact: If Facebook identify you as using your personal profile (newsfeed, banner) to promote your business they can restrict your profile from running ads and/or ban your profile
There are many more reasons why accounts get banned.
About: 9) Using Personal Profiles for Business - I am confused, because how to create and promote BM without profile
You can go read them up on the Policy section - it's not a fun read but unfortunately you need to at least know the popular ban reasons to stand a chance

Any others you'd add?