Apparently there is “entrapment by estoppel” in which a government official tells you an act is legal when it isn’t. They have to be acting as a representative

Apparently there is “entrapment by estoppel” in which a government official tells you an act is legal when it isn’t. They have to be acting as a representative of the government, though; undercover cops wouldn’t count. I still wouldn’t be very excited to try this defense in court.