You will find that most cheats are also VERY Stupid. Just see the screen shots of Yunie saying he doesn't cheat on another thread (Screenies had the cheat running).
Just follow a couple of people around, and it will be almost immediately obvious if they are using external cheat programs. You will also be surprised (or maybe not) to see that they talk about the cheat programs all the time, and ask each other if they are running it at the moment or tell each other what chance the current book they are translating has of success etc. Cheats are quite easy to find..
There are a few that are crafty enough (and intelligent enough, but not many in this category) to hide it, and those are the ones you need to worry about, but luckily they are VERY few and far between.
Mick
P.S. Personal Insult to Cheaters :P