Clearly, from my reputation record, there has been some vindictive downvoting in the last three days or so. MathOverfflow is a community of people, not saints, and things like this are expected to occur at one time or another. What can be done about it? The small loss of reputation points doesn't matter to me--I've deleted some of my own questions or answers, some with five points, or so, after I had published better on my website and/or had received no significant responses. But, I would like this childish behavior to be reprimanded, if possible, particularly since much younger researchers, or relatively new users, might be discouraged one way or another by it, and since I don't in principle agree with such gratuitous censorship.