I find this a waste of time to be honest. I just have the protagonist of the story, franky1, on ignore.
It can be easy to forget though that the most readers of many posts over the long run won't be regulars or thread participants, but randos doing research or people that landed in from a search engine.
Normally when two people are arguing on the internet with such a rant no one is paying attention to the discussion except the two of them. And in the specific case of you and franky1, if the one who supposedly could read you has sufficient knowledge he will immediately realize that franky1 is talking bullshit.
I remember the first time I put him on ignore he responded to me with up to three posts in a row and I had already told him that I had put him on my ignore list.
The best thing to do is to ignore him, you just refuse to admit it. Otherwise you are playing into the game he likes best.