Two months later, B has no job, and A confronts him  A and B have a fight, B threatens A and A is forced to move out for safety concerns.

It's easy for these companies to send a threatening letter.

Sounds like she's being threatening, and if there is no calming her down to talk reasonably, then I'd take a harder line. 

Blaming Airbnb and waving contracts and threatening class actions seems a little like fleas arguing over dog ownership.

He'll know what you're eluding to.2) The lawyer is interfering with your desire to survey your own land, by threatening you. 

Just because someone threatens bankruptcy doesn't mean they will.

She's making it difficult for us to find a new tenant by pushing us out of prime rental period and basically threatening us by telling us evicting her at this point would be a waste of money.  

I even had to explain to them that if they involved the health department - which they were threatening to do - what would happen.  

This renter has recently violated the lease with an unauthorized roommate which would cost me more to evict and most recently threatened if I raise the rent at all "he and the next door tenant will move, but he will fight it I am most certain!

Also, this tenant has so far been very friendly and non-threatening, which is why I was trying to work with him.