(And an increasingly common one, eg., cf. crypto).
The guy installed spyware on laptops in a commercial store and then publicly displayed the data collected. It's an open-and-shut case.
Almost any person who went to that store, and any store owner, would be furious. It is these people the law here protects(, and damn right too) -- the interests of the artist aren't "the little guy's" and more than a burglar is the underdog.
A burglar claiming the police are corrupt for protecting property owners is as meglomanical as this guy. This isn't some middle-aged academic wishing he were in a mythical past, he's a guy breaking into computers, stealing data, and using it to boost his own career.