Although I have never banned anyone, I have had the occasion to delete one comment. This was in response to the post about spoiling film endings. In the discussion, commenters referred to various films that had surprise endings and discussed them without giving them away. Then someone came along and posted a comment that listed all the endings to every film that had been discussed. I deleted it so quickly that I suspect that most readers never saw it.
I recall a case when the sixth volume of the Harry Potter series was released that had a dramatic and surprise development that aficionados will know. Another blogger on the network that I was blogging on at that time, immediately put up had a post in which the headline itself revealed what the surprise was and on which page.
Such behavior is truly churlish. I am at a loss to understand the mentality of such people. They seem to me to be similar in attitude to vandals who destroy public property.
Why would anyone do such a thing? It does not benefit in any way the person doing the spoiling but simply ruins things for others. It reminds me of Iago’s lament in Othello: that “he that filches from me my good name robs me of that which not enriches him, and makes me poor indeed.”