Rig up a portable EMP device (shield yours of course)...get in the middle of a crowd of the morons and set it off every time.
They'll be befuddled why their cameras and smart phones keep on breaking down performing their "services"
I'm not really familiar, but are private investigators actually legal? Isn't surveilling someone without their knowledge or consent illegal? I guess you can't really do anything about someone taking photos in a public place, but can't something be done about those people following them? Or that guy who took Rinder's trash? That's like stalking behavior.
shareI think its all legal - otherwise how would the tabloid press be able to do it?
I don't see why the investigators didn't just stand their ground. They aren't required to say for whom they're working. Buy a soda at the bar and drink it in the lobby - you're not trespassing you're a customer.