K, I'm done testing:
This program can give false positives but when they happen they are obvious, because they happen very rarely, I only got a few and it was only on shadows, not scrolls, they're very hard to achieve and you need a lucky dual tap (when space hits the switch twice in one down), I've seen people incorporate the lucky dual tap into their roping but then again it only happened at most once or twice in a warmer turn, and I'm speaking about two or three people anyway.
So conclusion: this does help detect cheaters.
edit: dubc is right, FR as a gimmick is fine, but my god, some of you talk about it as if learning to FR was some sort of achievement...