I wrote this story called "Deviant" with a main character (a social deviant) who moves in next door to the police headquarters in West Allis, WI. He taps into their router to view whatever he wants online, and he spies on what they're spying on (a hot girl in an apartment nearby). The story was supposed to have some irony. Just like the fact that the latest meth lab in town was right next door to Jacksonville police headquarters. But it doesn't really mean bad policing, though it could.
It's not like police officers have the right to search every house that's next door just because it's next door. We wouldn't want that, just like we wouldn't want every car that drives by a squad car to be subject to a search. If the homeowner or driver isn't doing something wrong, there's no reason for the cops to come knocking, and that's really what ought to be expected.
If police knew the bar was abandoned, then we have more to criticize, perhaps. A vacant building, people entering and leaving, and chemicals. I think we just have to remember that since this is not a police state, people can generally walk around, with or without chemicals, even if they look a little shady. My assessment is that most cops were just doing their jobs of NOT harassing everyone. But it is funny.