Sometimes I'll just upvote a submission on the 'new' page with 0 points to trigger group think because I might think the article will spark interesting debate,

Sometimes I'll just upvote a submission on the 'new' page with 0 points to trigger group think because I might think the article will spark interesting debate, or to help prevent an 'ask hn' or 'rate my startup' submission from falling, which keeps other users here from seeking advice from the community.