No people used the same user/pass as other sites.  My account has 13 failed login attempts on it, because I use unique user/pass combination on every single site.

My guess is that other sites have been hacked and they just try all the user/pass combinations on MPH.  I've also been seeing failed login attempts to Suprnova as well.

NEVER use the same user/pass on two different sites ever.  Get a password manager like 1password, roboform, or if you have too lastpass.