This might just be me over-reacting, so I wanted to post it up here quickly to see what everyone else thinks.
From time to time, we might see what's regarded as a "bad" answer to a question. Something that's considered poor advice, incorrect code, or just a poorly thought-out answer. In my experience, it's best to down-vote those answers and also say why you down-voted.
Today, though, I responded to a question about the default sidebar meta widget. Someone else responded with a solution and suggested editing a core WP file. My immediate response was to say "no, this is a bad idea! You'll lose your changes in an upgrade" and down-vote the answer.
The commentor's reaction was to immediately down-vote my answer (which was already accepted by the OP). It looks odd to see a green checkmark next to a -1 ... and you can tell from the comment chains on both answers that it's becoming a personal issue. So I'd like to remove myself from that particular conversation and ask the community, what do we do with situations like this?