Hi all. There is one person posted a link in his comment on my video that is harmful to my channel. I am thinking of banning him and removing his comment. However, if I do that, does that mean he cannot comment any of my videos in the future? (that's exactly what I want) Or he can just post comment on other videos of mine with his links? I need to know this in order to avoid 'revenge commenting/link spamming.' Thanks!