idk, i kinda like the idea though.. u could set a few keys that hacks usually use to bring up a menu and such, and have it display a text that shows theyre a hacker.. its a good idea atleast, im not sure if its really worth going along with.. that all depends on how bad u want hackers to be known on ur server i guess..
check into the diff buttons used by hacks, i think insert, and delete are used by a few aswell.
if it was my idea id definatly get to work on it, and see if anything comes of it. he could be on to something here.