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.
"The important work of moving the world forward does not wait to be done by perfect men." George Eliot