On a question I posted yesterday, I asked for clarification after receiving a downvote without a comment. I do this, as sometimes voters feel like it should be obvious to me what is bad about my post, and after asking for it it generates indeed feedback. Today I found this comment of me being deleted. So is it not appreciated asking for clarification about votes?
I allways had the impression it is more like, Dvoters should be encouraged to give feedback on their downvote.