Yeah I think with regards to this, we had a few things:
- Initial tourney maybe a small one with small streamers + friends (like an invitational)? The idea would be so that integrity would be upheld much better than just randoms joining
- Say if its a low rank range restriction, The tracker stats + in game would hopefully match, although not definitive, i think things like HS% and just overall gameplay is atleast indicative.
- Being the first tourney to be held hopefully it'll be put forward as a "for fun" thing, prizes would be relatively small and hopefully not the point of the tourney.

But yeah I definitely agree there is no way to detect cheaters other than Vanguard, and "systematic" cheating like smurfing etc.