Corruption is a tricky subject. Pawns of a dictatorship, a mafia or any hierarchical corrupt structure... They might not be aware of what's actually going on but that doesn't change the fact that the structure is corrupt. Whatever caused this, Google's guidelines, its business practices, its investor relations, is corrupt.
Let X be the number of angry people who were affected by Robinhood's decision and let Y be the number of negative reviews left today, do you really think Y is greater than X here? If an app does a bad thing, it gets negative reviews. If an app does a really really bad thing, it gets a lot of negative reviews. What's so weird about that? Where is the "mob"?
So, if prosecution or police receives too many (above average) complaints about something on a single day, they should just trash all of them and go home, is that what you are saying?
How do you define "fake review"? People are not happy with a company and its app and they are "punishing" the company, what is the purpose of reviews if not this?