Well, as a player who plays against you a lot, I have to say, while you are a damn good player, I have never seen anything remotely resembling cheating. In my past life, I was a game admin so I like to think I have an eye for hackers and, no, I don't see one.
That being said, you are damn hard to kill. There I am, trying my damnedest to catch up to Pete the Greek on the ratio stat and, as soon as you come in the map, my ratio goes to shit - LOL.
I think you and Sherm are my nemeses in the stats. Definitely the highest ratio of kills to deaths.
Don't let it get to you. I take it as a form of compliment. When you kill someone enough that they start to accuse you of hacking it's like saying "you are that much better than me, you must be cheating" even when we both know you aren't
See you on the battlefield, although hopefully not too much LOL