I am highly in support of this.

If people get chastised and rediculed because they aren't doing enough DPS, then they will either start doing enough DPS or stop playing with jerks.

Then the jerks who are awesome at the game will play together and be jerks, and the people who suck will play with nice people or other people who suck.

I hate the argument that parsers create a toxic environment. That's like saying a stop-watch caused a fight between two runners. The stop watch didn't do anything. Leave the stop watch alone.