Nothing wrong with negative criticism, but I think what Dave was complaining about was the people who say things like "It's a bunch of Crap", and leave it at that. That's not criticism. Explaining why you don't like something is criticism, but some people don't seem to have the time for that.

I'd love to see the stage version of the skiffle version of Die Fleidermaus> The Ring Cycle would be a bit too much for me to handle.