My pet peeve involves the answers, rather than the questions. Shocks should go to those providing rude, dismissive or condescending answers to obviously new to Perl or new to Perl Monks questions. We should be a safe haven for people trying to learn.
Although, now that I think about it the same applies to answers to experienced monks questions. Civility on the internet is hard to find; we should always find it here.
"Worry is like a rocking chair. It gives you something to do, but it doesn't get you anywhere."