Quote Originally Posted by neoreturn View Post
I like blizzard security system. they will lock your account if someone else try to login far from your home town.
They already do this - I couldn't log into my sister in law's account without it stating "suspicious behavior" and locking the account down till you reset the password through an email link and that would then mean someone has access to your emails as well, so you may want to check your PC..

Otherwise, the only way someone can get into your account without resetting it:

1. They already had access via you letting them on and having them reset it, which ties their IP to your account and prevent lock out. I know this first hand because I do it with my family.
2. They know enough about you to reset your info through SE.

Otherwise, it sounds like either someone you trusted or you got logged, there doesn't appear to be a large breech in SE or we'd hear more about it by now.