For reasons that are too numerous to count, your account has been locked out.
Accidental Typos - We detected 5+ typos in your password, which is just not acceptable.
Password Not Strong Enough - We've been hacked by a 12-year-old with a dictionary.
Password Not Used Enough - You haven't changed it since 2008.
Suspicious Login Behavior - Our algorithms detected a suspiciously high number of logins within a 5-minute period.
Password in Security Forums - We've found your password in a security forums thread titled "How to Crack 99% of Passwords".