If anyone remembers how PirateJutsu was hacked... I said the Trade Hack, and wasnt really beleived about it, and it was claimed a false hack...
I also found something on Basil about this hack (Dunno if its a legit report though)
http://www.basilmarket.com/forum/675885/1//Hacker_threw_out_my_HOG.html#
To me this seems like a true report. But the trade hack, if actually real would cause alot of chaos. (Not so much as the guild hack though)
Also the few hack sites I look at (Not gonna post them, cause I was keylogged once from them...(coughcauseofmarueshackingcough))
When I was on the sites I tend to use, even most hackers claimed it was a hack that is very hard to design.
Dunno if this is true or not, check for info if you'd like.
A funny thread I also found on Basil
http://www.basilmarket.com/forum/676033/1/#
Revenge of a hacked player xD