There is no way to "hijack" a comment by anyone, not even "folks with a history of coming here to cause problems". The few I have found nixed involved, as I reread them from my archive, leaving the impression that I was assessing another poster rather than the post content. I now scan posts for the word "you" and avoid classifying other posters or groups of posters with comments like "folks with a history of coming here to cause problems". That seems to work okay.