It's possible. As a thought exercise, I'm sure Amazon has figured out some sort of formula to prevent the sale of illegal items on it's marketplace, which it has to operate at scale. At the very minimum a structure like that could be put in place. Another approach is the community of moderators that Reddit uses.

So many Silicon Valley companies launch products designed to scale without any regard for social impact - it's time to move beyond that myopic pov. It's not someone elses problem.