If I ever suspect cheating at all, I simply send film to HTC and move along. I have no care in the world of the outcome of what I send in for review.
But there is absolutely no reason, what so ever, under any circumstance to confront someone in forums or IM in game regarding cheating. You accomplish nothing. And usually, 99.9% of the time, it is a lag issue. Information from one screen to another. It is really that simple.
The ONLY way you can fix it is to film your flights and if you suspect something, just send the film in. HTC does NOT tolerate it. Nor do they tolerate harassment.
Not too sure a MOD is what you think it is...