I have heard what wormbo said, and thats a crock, it can mess things up more than that. The largest problem with it is the rediculus amount of false hit's it generates. The only good reason to use it was to stop the "tweak", which wasn't really a cheat like an aim bot, but more of an assortment of vis hacks that upped your FPS and made it easier to see things. Problem was antiticc got more legit players than cheaters so it was a pain.
I do care, marginaly. I didn't see much cheating in the instagib comunity, apart from the brief time where tweak was used (and for the record people came out and said they used it, we all tried it and the clans voted on what to do with it, we decided not to use it) I never really had to deal with it. I saw an ElF 2 times in IG, but by in large there wasn't much cheating. However I have seen it allot in NW. Hence why I care only marginaly
Edit, and if you don't want cheaters, play on locked servers