Cameras at the front entrance have become the norm. Can't be used for anything against you. You can claim that you were responding to a Facebook marketplace ad for various items, didn't like what you saw and left empty handed.
As for the actual cameras in the incall, you take a risk, and hope for the best. Ive walked into an incall where there were sketchier things happening than a possible hidden cam, and had to walk out. Most SPs don't allow recording so there's also that, as it violates some level of their privacy. The only SP I knew who liked recording that I had a session with was open about it. She offered me a mask and some temporary tattoos to put on make myself unrecognizable ?, she wanted to start an OF page at the time, but never went through with it.