The worst thing about an accredited parser is the trickle down effect. It's not just raiders who will use them. They end up being reasons to kick people who are leveling, new people who are learning their class or anyone who doesn't meet the random dps number someone assigns to an instance. I've seen this happen in other mmos, chat spammed after each lowbie fight, not to help anyone but to stroke epeens and shame other players. As much as we'd like to believe that those kinds of players are few, the truth is, annonimity breeds elitist attitudes. I would have no problem if only high end raiders who have their own team would have parsers (which they do already) but it doesn't just stay high end. You can't stop the trickle down effect no matter how much you want to.