As mentioned earlier, saying any player sucks/using abusive language can lead to a GM report; saying that player X may need to work on learning their skills is okay (constructive criticism); using a parser to tell a dps that they aren't good enough can lead to a ban. It doesn't even matter if you said it in a nice way; that program is against ToS. Period.

Part of the problem is when you have an ilvl 70 dps and an ilvl 100 dps in the party. Using a parser to determine whose dps is too low really won't work here. The guy in DL is gonna be shat upon for no other reason (probably) than he is in the process of upgrading his gear.

Those who suggest we have parsers available to improve our dps output... you do realize that many of those who have weak dps and good gear haven't even taken the time to learn their skills? What makes you think they will understand a parser much less take the time to actually look at it?