In case anyone needs the clarification, facism is not about exposing who thinks what. Facism is about extermination of the opposition, and minorities. And, one huge point against facism is that they can stop being bigots. Meanwhile, minorities that would suffer from a facist regime have no real option to stop having a skin color, religion, or sexual orientation.
That’s the whole point about exposing these “customers”. To make them feel shame (or threatened, if that works) so they disengage any political actions. It’s about disjointing fascist activities and the danger they pose to society.
They were cutting files in smaller parts and spreading over multiple locations and countries. At least that was the claim in the early days, so anything illegal would require lawyers on many jurisdictions sending the same letter (e.g. DMCA takedown)
Ironically, it did work but now that Durov is in jail channel admins would do good to take precautions.