Should I lock the threads you are obviously referring to. I have thought about doing just that.
All I can say is that you have shown far more patience than I would have, and that's probably a good thing. If I were in your position I'd probably end up with an empty forum.
I don't know what the proper course of action would be. And I don't envy you your position. I've often wondered why anyone would purposely start one of these forums. It's not an easy thing to run and it appears to be a thankless job.
I apologize for that comment about your forum. I'm sure you're doing what you think is right and you can't control the posters here any more than you could herd cats. Short of booting them, I mean.