TL;DR: Comments can call out inaccuracies in the post, link or multimedia content; you might be increasing the exposure of low-quality content without realising it!
I know that we all like to read titles, and vote on titles. This, however, needs to change. Too often have I seen articles or pictures posted here, with ridiculous numbers of insightful votes, but which the majority of the comments criticise. And I don't mean "I disagree"-type comments.
In more than half of these cases, the content has either been biased-beyond-reality or fabricated outright.
Please, do us the favour of reading these comments – and preferably the linked articles! If, after this, you still think the content is worthy of your vote, then feel free to vote! But don't support low-quality content.