Earlier quoted context omitted.
Illegal to ban users? So a neo-nazi account spams, harasses, doxxes hundreds of users and spreads gore all over your platform, and you aren't allowed to shut them down unless you go through the court system first? This is one of the most absurd ideas I've ever heard.
Harassment is against the law. Maybe your platform shouldn't allow such abuse? They can fix their platform so this isn't possible without banning anybody. I'm just brainstorming here.
How? You can't preemptively determine the output of a Turing-complete program without solving the halting problem, so while Google will always try to do their damnedest to predict a bad actor before they get to the store, they will definitely always fail to find some.
If they can't ban them when they find them, what should the alternative be?