Don't agree.
This stops one sided and incorrect theories and assumptions being presented as accepted facts to other readers that could not discern they were groundless nonsense by themselves.
The mods will use sensible discretion to enforce them.
I don't really care if you agree or not, just know that it is against forum rules, and you can be banned for ignoring local rules. Moderator discretion on the matter would be like, not allowing local rules in a scam accusation thread, or not agreeing to enforce local rules if they are too complicated, too much of a hassle, or intentionally baiting people to break them.
People have the right to be left alone if they feel someone is stalking them across boards. If they say that they don't want someone posting in their threads, you can't post in the threads.
Do what you will with the explanation I've given you.
I think that depends on if they're real facts or "cryptohunter factsTM".
It does not. Be it the most insightful post of all time, or garbage, if an OP doesn't want someone posting in their thread, it is their right to not allow them to. Your remedy is to make a new thread so you can discuss what you'd like discussed.