As mentioned before, the best thing to do is not say a single word. You don't talk, they usually keep going, then start to annoy people, then get kicked for just being a general brat because they automatically assume more people are starting to hack in game. If the majority think you hack (Let's say in a 8 vs 8 match, you PO'd 6 or 7 of the 16.), then it would just be better to leave, because even if your teammates do stand up for you, it'll probably only be about 3 or 4, 5 at the most. If they don't kick you, you don't leave. and it's just one noob hackusating, aim specifically for that noob the entire match. Eventually, they'll say something like "OMG WTF YU HACK LOL IM LEVING!" (Player has left room) And then you can go back to pwning.