If you don't know an answer, why don't you simply pass-by?

No question is stupid. We are all human beings and can have different ideas at times and just because of difference, another idea can't be wrong.

If you don't like someone else's idea, just skip it, don't make it dirty using obnoxious comments just to get some up-votes.

Your votes here are not dollars, you can't expend them anywhere. It is just a measure of how you contribute to community. Make this contribution worthy of its figure. If you can't answer some questions let others do it. 

My suggestion is to remove up-votes for comments (just) under the questions, only down-votes there.