But if every one is going to comment their votes, soon more than half the posts here are about explaining their votes. But since you can vote on those votes, eventually, all that's being talked about is how one voted. Perl content will be hard to spot.
That's one application for the /msg facility in the Chatterbox. You can give a private
message to the author, congratulating them on a good node, or LARTing them without embarrassing them in public. However, if there is a correction to code or factual inaccuracy, it is a much better idea to post a reply, so that everyone can get the benefit.