Another example of startup hubris. Much like Uber and AirBnB got started (and in many cases, continue to operate) by flouting regulations, Robinhood thinks they're being innovative, when they'll really just hoping they can get big enough that they can buy or bully their way past the rules. At least long enough to get acquired. It might work, but in this case, the people most likely to get screwed are the customers.
I agree though that Robinhood is a different story with potentially harmful consequences for unsophisticated investors looking for a safe/easy investment.