This morning I down voted a question that does not belong on this site in my opinion (as did a half-dozen others) using the very clear criteria for a down vote.
The user that was down voted dug up a 2 year old question of mine and attempted to initiate a dialog in the comments on this old question, trying to get me to explain why their question was down voted. Overall the comment was somewhat harassing and I certainly don't intend to reply to it.
Is this type of behavior permitted here, or is it categorized under an existing rule? If the former, I could see that being a problem since it may discourage users to down vote bad questions and answers, affecting the integrity of the information on this site.
The comment I'm referring to is below: