I always assumed you didn't need to be very good at moderating to make a certain type of content meaningfully unwelcome. For example, you can't put pornography

I always assumed you didn't need to be very good at moderating to make a certain type of content meaningfully unwelcome. For example, you can't put pornography on Youtube, but it's still reasonably easy to find a video with nudity. It's easy to lose a lot of time trying to craft the perfect definition, but you can get 80% of the benefit with a rigid and conservative definition. So I don't think you need to remove content that "arguably" breaks a policy, you just content that "explicitly" breaks it. This hopefully causes folks to the extremes will take their content elsewhere (to a hopefully much smaller audience).