There's loads... http://www.hackingsource.net/ You're an idiot to try it though, unless playing with mates on a private server etc etc
Yes, a very big chance. That's if you play on public/global servers anyway.. C'mon, this is just plain common sense. I'm not gunna reply any further to this; I've answered your original question, the rest is down to you.
Doesn't that basically take out all of the fun and point of the game? Playing that game a lot is lazy, cheating on it is even worse...