I like the meaning behind DBF's posts but witch hunts are just not the way to get people to change opinion.
I have moderated a busy pet based forum and we had many similar issues with witchhunting, and the bashing of posters just doesn't change opinion, it just doesn't - all that happens is what has happened with yesterday's thread - the OP gets affronted, upset and angry, and either leaves or decides that the poster who has bashed them is wrong. And the animal is still stuck in the same position.
Softly softly catchy monkey is the term I have to use in situations like this - no one likes to be beaten to a pulp (verbally) over their mistakes - you certainly wouldn't treat your children like it.
Monitors are a great idea, especially for such a busy forum like this, I don't know how many team members MNHQ has but even for the forum I moderated we had a team of 6 or 7 main admin and an admin aide team underneath us who were in charge of keeping an eye on threads, flagging any turning bad, and helping to remind posters to post helpfully and politely.
I'd happily volunteer to be a monitor on the doghouse, did try to pm Justine but it told me not to be so silly 