It's sort of a Russian tradition, valar_m. Even the most powerful were harassed like that, and even in Stalin era the police would just back off sometimes. It's not them punking out; it's showing contempt. "We are not in a rush, little one". The purpose is to wear the victim down.
"[General] Zhukov had always been notified about meetings so this impromptu one worried him. The night before the meeting, three men came to Zhukov’s home for a random search, but they had no warrant. Zhukov threatened to use weapons, forcing them off his property. After they left, he did not sleep the entire night, fearful of the next morning."
https://huhtaj.wordpress.com/scholarly-writing/power-struggl...
He pulled a rifle against NKVD functionaires and they walked away. Was it THAT soft under Stalin's regime? No, it's just toying. Cat and mouse. It's about sending a message: we can get you any time we want, even if you're a world famous general or Russian Zuckerberg etc.
American, or, in general, Western commentators often don't understand this type of moves because they belong to a different political vocabulary, so to speak. "Hah! They even had no warrant, how amateurish of them" - no, that's the POINT.
This could likely be part of some behind-the-scenes "negotiations" between Kremlin and the owner of VK...
Police brutality and abuse in the West (or probably anywhere, for that matter) is a fact of life, but this is not the same thing.