Even if so, I can't imagine that anyone anonymously bolting radio equipment onto public property cares about usage rules.
Also, theft of one of these things is probably a criminal charge regardless of what rule someone was breaking with it. I'm a licensed motorcycle operator. If I see someone irresponsibly biking in a national park, I can't just take it when they're not looking.
... but I get huge hall monitor vibes from a disproportionate percentage of folks in that crowd. For some it seems like it's not about using rules to protect the airwaves– the rules become an end themselves.
Installing equipment for everyone to use is the opposite. No one is harmed by such installations.