Parsers currently are a bannable offense, as others have pointed out. I get both sides of the parser argument. I wish they were "legal" in that I like using them for guild/free company runs. When you aren't meeting some sort of dps mark, it's not always possible to know who is the one that needs to work on stuff just from what the game gives us. On the other hand, parsers tend to lead to inevitable hikes in what you need to be outputting to even run with a premade group.. but so does ilvl.. and there's always the argument of "make your own group" thrown at people who don't like it.

Jerks will be jerks though. The person who's gonna berate you with parser numbers is also likely to berate you without them. Personally, I wouldn't find someone asking if I was trolling that offensive.. but to each their own.