Toxic people are just toxic. People run third party parsers whether you know or you don't, ever wonder why that tank left the group after the first boss? 8/10 was because he wasn't pleased with dps.

In-game parsers would segregate groups, may force people to improve (God-forbid it) and maybe more people would be able to clear dos checks (btw, dps checks were introduced with pandemonium warden cause people who like to take hours to finish a fight reported that they took 18 hours to just give up...bad press from players who need a sense of limitation...I mean who the hell is going to keep trying for 18 hours...lol those PPP items weren't even hard to get)