Facebook is super picky regarding anything that seems off from regular user behavior. Even if you’re steering clear of spammy actions, things like weird login patterns, sudden bursts of activity, or having multiple accounts log in from the same IP quickly can still set off their alarms.
Even with residential proxies, Facebook can still detect suspicious patterns, like multiple accounts logging in from the same IP or using flagged proxies.
Facebook’s AI is always improving, so it looks at things like mouse movements, typing speed, and more.
No matter if you're using residential proxies, Facebook might track device fingerprints and cookies across accounts, which could trigger flags if they’re too similar.
To avoid this, spread out login times, vary your devices, and keep activity in line with normal user behavior.
Rotating proxies regularly and using those with a good reputation can help, too.