I suppose it depends on the jurisdiction. For instance, some courts, like the 9th District Court of Appeals have ruled that cities can't remove homeless camping on public property. Public forests are public, and there's lots of trail cams.
Yeah, the issue with those who are homeless is that it essentially criminalizes living for people who cannot rent or own, and thus infringes on their liberties.
There’s no right to hang up privately owned cameras in public.
I am imagining an army of homeless sitting at every intersection in the US holding surveillance cameras and getting paid by # of unique plates scanned per minute