Well, I remember back when the game didn't have thousands of hackers, late 2008 to early 2009. At some point near that time somebody on MPGH hacked a GM or made a hack to become a GM. They then started spamming ads over the whole game.
I'm not sure, but it might have been at the time when black walls (when you try glitching there's the black stuff) didn't exist.

Does anybody remember this?