Someone once said:
"There are no stupid questions but just stupid answers."
However, on Stack Overflow a down-voter gets -1 for down-voting an answer, but gets no penalty at all for down-voting a question. This means that the down-voter can label any question as "stupid" without feeling any pain. Is this fair?
I think some people feel a pleasure to down-vote, so they need to have the ability to do this without feeling it.