So what happens when I'm doing something "wrong" (whatever the fuck that means) but it doesn't have anything to do with their climbing wall?
Just jumping in here but I assume they could press charges as it is their property and they would have evidence against you. Not that they would necessarily press charges.
Or if it is a park as you say (I assume you're right here) then the state might be able to use the tapes as evidence against you, and the state loves to go after pot smokers like you.