These weren't on public property, they were on the property of the carwash that you see in the surveillance video. Troast claims that it's a misunderstanding and that the carwash said he could take them down, but tbh that makes absolutely no sense because why would he be involved at all? If the carwash didn't want them there, they could take them down themselves. He did it because he thought he could get away with it and then got caught by surprise when they called him out on it.