Votes (both up and down) on questions are a way to prioritize questions that need answers. Upvotes should be welcomed from all (fellow users who want an answe),

Votes (both up and down) on questions are a way to prioritize questions that need answers. Upvotes should be welcomed from all (fellow users who want an answe), but downvotes should be welcomed only from reputable answerers who took time to read the question and decided it's poorly formed. Answered questions would be fine having their vote button disabled.