I would consider taping without permission a violation, either me of T or T of me! I don't see any reason either of us would need to do that, anyway.

I find such things a bit sneaky. I had an employer who used the record function on his phone to record what (if anything) people said about him when he left a room. He would come back a few minutes later to retrieve the phone that he had 'forgot' to take with him.