MNHQ maybe it'd be an idea to set out clearly what people can report using the report option. Saw a few people asking for things like the ability to report a poster rather than a post etc.
Maybe just setting out somewhere that people can report a post, but say in the comments stuff about the poster, posters or thread.
Eg.
"Reporting because this poster keeps popping up with similar comments that aren't PA, but appear to be trying to get a reaction"
"Reporting because this thread looks like it's about to descend into one hell of a bun fight"
"Reporting because this a poster appears to be being picked on"
And so on.