Haha, what a great idea! I love it! Sending me a signal about things you don’t want me to record!
I would build two things. First, an antenna that detects and (using multiple copies) locates these signals on a real time, public-access map.
Second, I’d build a security camera with a wide angle lens that turns ON whenever this signal is received.
Sure, 90% of people don’t know how to do these things – but I do, and I can put them in a store and the results on a website. Most people know how to buy a thing and plug it in, or access a website!
Then I’ll manufacture a ton of them at a factory here in Vietnam, and you will be able to buy them at a reasonable price. I’ll make a tidy sum, pay a bunch of taxes that will build highways and schools, and you’ll have more freedom than you started with.