re wack a mole' lol. lovely.
I call 'em 'drive by posting'. or posters.
simply done to illicit some sort of emotional upheaval I think.
oil well.
as for them interrupting anyone or anything, there is always the option of simply over looking such derogatory posts and skipping on to the next post.
I think ignoring ignorance, is the appropriate path. it doesn't like that.