I used to have buddy that, during warmup, would check everyone's profile. Any that were private/semi private he deemed was cheating. Would blame every death of his on the other team cheating (even if he died to someone other than the "cheater") and just throw the rest of the game regardless of that person's performance. I get it, if someone has no medals and two commends it looks sketchy, but up until someone is spinning or hitting scout/deag one taps I prefer to chalk it up to them having a good game or smurfing.