Comment by tuckerman

I would be surprised if those don't already exist, I hear stories in the news all the time about small hidden cameras places they shouldn't be. For a private space like the locker room I'm not sure what option there is besides laws making that illegal (I assume/hope that already is?). Someone dedicated already can get a much more discreet camera.

For public spaces, at least where I am, there really isn't a legal expectation of privacy. I couldn't tell if someone was watching YouTube or filming me with their phone and I probably don't have any recourse anyway.