It is such a difficult balance to be had since by taking a position of trying to resolve any/all frauds in the platform, they create a can of worm that is difficult, if not impossible to fill. The failure of finding all the frauds, illegal activity would prohibitively expensive, if not destructive to the platform itself (Think false-positives, etc).

For them, it is better/easier to say "we have the platform, we remove what we are legally bound to remove, everything else is on the user to be mindful of".