Facebook locks users in a closet for using same passwords/emails on Adobe | Naked Security

Proactively protecting password recyclers

"If you've used the same email account/password combo on Facebook and Adobe, Facebook has probably already pushed your account into a closet and locked the door.
It won't let you out until you change that password, security journalist Brian Krebs reported on Monday.
[...]
Not only is Facebook being non-Big-Brotherish, it's being proactive in protecting customers, for which it deserves hearty kudos. If only all companies shepherded their customers' data in this manner."

Facebook locks users in a closet for using same passwords/emails on Adobe | Naked Security