I was in a good mood today and I decided to give an answer on an unconstructive question that should help the OP underway (one of the hasn't tried anything, expects code writing service kind of people). However he keeps posting comments underneath that it is not a full solution etc., and from his behaviour I can deduce that he has little programming skills.
I want to prevent him posting more of the same kind of comments, I've already flagged two of them. Ignoring does not seem to help much. Therefore I would like some way to block further comments on my answer. I don't want to remove my answer since it is still legitimate.
Note: this question is different from: Way for members to block specific community members from commenting/answering posts? Since it concerns blocking a user entirely. My suggestion would confine itself to the scope of a single question.