it's already on it.
If you want to be dirty then do something that will get you in trouble
hack, glitch, etc;
Staying CBL clean is kinda important to some people and others it's not
I don't care about being CBL Clean or not because my main account was used by some little ratty kid and he used mods to play on it, took a screen shot and posted it.
Therefore my CSM2 (I quit because of my computer failing) got CBL Dirty.