I agree that silly questions can be annoying, and I have been the cause sometimes.
However, because of how goddamn reactive people can be to questions, I'm actually becoming worried about asking them. There have been times recently when I wanted to ask something, then figured even though I couldn't find it in search, that it must have been asked already and I don't want to suffer any repercussions for, god forbid, asking the same question twice. Basically, I just don't want to be bitched out by a mod or a reg or an elder or whatever. Not really a fan of that. Overly severe repercussions for questions can keep people from asking them, and sometimes those questions are ones that should, or NEED TO, be asked.
I also have not had great success with the search feature. Sometimes works, sometimes doesn't, for me.
So while I agree the same question again and again is fucking annoying, I also don't think a bunch of severe warnings are going to be helpful overall. I mean, we NEED people asking questions, preferably good ones, but if some bad ones slip through, well so be it.
Just sayin'.