So this game has dps checks but we can't talk about our dps in game?

[IdowhatIwant]

But the solution is already at hand in high end content (assuming you are running it through pf): look at ACT, deduce who is the problem member with the information ACT provides and what you saw yourself during the fight, kick the problem member. No words need to be exchanged there.

I think the new ToS you can get in trouble for this as well.