Even if you find a username and password on BugMeNot, the vast majority of Facebook accounts today have 2FA enabled. That means after entering the password, you will be asked for a one-time code from an authenticator app or SMS. Since you are not the account owner, you will not have that code. The login attempt ends there.
But what is BugMeNot? Does it still work for Facebook in 2025? And more importantly, what happens to your device and data if you try? facebook login password bugmenot