Don't think you need to make a thread everytime you change your password, Just have your private keys to a staked address if any questions come up.
I don't think fanbitcoin steals passwords though, just earns off ad revenue.
He probably just wants to stay on the safe site to ensure that no one can impersonated him in case there is a rogue user posing as him here.
Why would someone impersonate him based on his password change?
Also, when would someone get the chance to impersonate him? He changed his password right away.