This thread does kinda worry me a bit, because I've been brought up with the attitude that criticism is important. You only have to look at the number of bad webcomics out there (CAD, Broken Mirror when it was still active) where the authors stamp down heavily on any criticism they get on their forums.
Granted, MSPA is in a different league to that stuff, and in particular it's managed to set up a nice feedback loop where the pesterlogs develop the characters and give them unique voices, and the characterisation in turn makes the pesterlogs fun to read, something that the aforementioned comics don't really do with their textwalls.
I dunno, maybe I'm missing the point because the big problem here seems to be the rudeness of the criticism rather than anything else - that and most of the criticism here seems to revolve around the direction of the story, which is far more subjective (and thus probably better if the creator ignores it) than, say, flaws in technique.
Oh well. Words.
edit: bugger, I think I just rerailed the derail.