Come on guys, don't put all hackers in the same category. (Bill Gates is the greatest all time hacker and you all wouldn't even be on here without him.) There's good hackers and bad hackers.
Using hacks and cracks to cheat is very bad and very annoying. If you can't get your skills the right way then you shouldn't play at all. I'm talking aimbots, foghacks, wallhacks, etc. Anything that gives you an unfair advantage over the other players. Now hacking your config files with optimum graphics and network settings is okay within limits. Especially if you have an older computer and can't play the game at 1080p. (My current monitor doesn't even go that high!)
I've been accused of using aimbots on our clan servers several times but can honestly say I have never used one. I do however use a trackball while everyone else uses a mouse. It's just easier for aiming to me. That could be considered a kind of hack, using a completely different pointing device, but I tell everyone to switch to trackballs, it's much easier to use I think, but that's just me. I've been using them since before Pentium was even thought of.