Just out of curiosity: doesn't the US have any laws against private surveillance of public spaces? As a European I find this quite irritating (not saying we do not have problems as well with more and more cams installed and risks related to an increasing number of e.g. parking lot cams)
No, you don’t have an expectation of privacy on a public roadway, public parking lot, etc.
I'm not a lawyer and I think this varies state by state, but I think that in general anyone is allowed to record in public spaces.
I think the general idea is that if you could (legally) go stand in that public space (sidewalks, roads, parks) and watch something happen then you're allowed to record what you see.
This is probably good - I think it's the basis of being able to record misbehavior (by private citizens and/or the police), for example.
In contrast you're generally not allowed to record stuff happening in a private space unless everyone's been informed that this will happen.
This is why you'll see signs saying "Warning - this place is under surveillance" signs on every single door going into a corporation that wants to use security cameras.