@Chad35
This thread from January just reappeared in the CC. I hope you were able to get the situation resolved well.
About the guest threatening you -
- you do know this is extortion? and that Airbnb frowns on this?
- if it was off-site, in order to not leave a 'paper trail', in such cases you recap having received their call
or text message and copy in the quote of what they said to you. The on-site message board is vital as record of proof to Airbnb of conversations/problems between host and guest.
- if in future a guest threatens you with extortion or is otherwise inappropriate, you report them by means of the little gray flag in their message or on their profile.