This topic has been discussed "ad nauseam" on this site. If you don't like all the repetitive posts, just scroll on by. Or put the person on "Iggy". Fast and simple. Works great for me.
Dougie, even on iggy, with 20 messages back and forth between them, it ruins any chance there was of any sane, rational debate on any topic. That is why I am here.
These 2 are well beyond anything I have seen on this site.
Time to send a message and ban them both for at least a week.
See if that gets their attention.