But the how is just a means to an end. He doesn't need their consent to record them. As annoying as it is and as unfortunate as it is to not want to be recorded, he's just being deceptive in what hes doing.
We all are the victims of bait and switch tactics either by companies, the government or each other. My point is, if in public, just know that someone can record you like 007 or the paparazzi and it's not illegal.
By the way, I don't condone his behavior, so apologies if I'm coming across like that. I have seen people catch cases because they are being recorded in public and escalate the situation because they don't want to be recorded, but don't understand the law.