not really something that can be fixed, they could clog the game up with GameGuard Hackshield PunkBuster etc. but they slow the game down, cause more lag, extra boot up times, crashes, they even spaz out if you try open some programs like Microsoft Excel sometimes, plus most parsers would be detected and a lot of people would get upset

i'd rather let a few people i've never played with use their hacks and get on with my own game, they'll get bored in a few weeks and go hack another mmo then another, cos thats how they get their fun