"It might support cheating". They are really funny. There are guys using auto-dingers, use programs to slower the meter, rulers, winds calculators, etc. But this MIGHT SUPPORT CHEATING.
Of course it depends on what kind of player you are. In my case, I like to make good scores, but I don't need to cheat. Sometimes I play very well and some others I suck. But I still play. It all depends on the player honesty.
One thing you can do, is to disable the chat during these groups rounds. I know it's a pretty basic suggestion, but why wouldn't they give it a try?
PS: if you see me green, send an invitation to play.