I'm not going to warn prospective tenants about a bad landlord
What is going on between you and the landlord?
Vaguely yes. He's a good fellow but a bit dense and a noob.
You should always warn people of potential bad landlords. It's only right to do that.
I can't, I wish they don't contact me.
It would just be the right thing to do so other people do not have to go through what you went through. I am sure that the people would really appreciate you giving them this heads up.