My pet peeves:

1. patronizing salutations, e.g., "Most esteemed and learned monks..."

2. non-descriptive titles, e.g., "Need help"

3. misspelled words, e.g., "seperate"

But none of these deserve cruel and unusual punishment. After all, we do have a voting system, so even if they don't care about XP, they at least know how their question was received—or not.