Well, I've never been accused of it, least not that I can remember, but I did have an interesting match today on War for Cyberton; In team deathmatch on Molten, the lagg was really severe and I was playing scout, which is already insanely easy to get massive killstreaks with. The lagg was so bad that for some reason, every time my cloak timed out, it was immediately cooled down and ready to use again, meaning I could remain invisible for nearly the entire match, and when I wasn't invisible, then I'd be getting damage boosts from having just come out of cloak.
The game was played to 40 kills, and in a really good match on this game a single player might get around 15 kills, with 0-2 deaths (least that's what I'd call a good game). Match ended with me on 26 kills, 2 deaths. Of the 3 other people on my team, 1 had no kills or deaths, another had 9 kills, and the last had the remaining 5. Nobody on the opposing team had even got to double figures in kills, and overall had only about 20 kills.
It was probably down to the lagg being so bad, but it sure fely like cheating! I however, am not ashamed of the utter arse kicking I handed out that game