Why should it be illegal?

It’s perfectly legal to photograph strangers in public. You’re in public you have no reasonable expectation of privacy.

I don’t see people assaulting CCTV cameras for instance.

Sure some weirdos might I use it for nefarious reasons but if it didn’t exist they would still be weirdos using something else.

A lot of conjecture here.

“If” and “a good chance”. 😞