Why are you asking me as if it's my problem to solve? If you're trying to imply that Google can't do any better than robots taking things offline, then you're going to have to try harder - back in my day we had human moderators on internet forum boards and they did a damned fine job.

Google's done it the way they have because it's cheap compared to paying a bunch of moderators, and mostly because they really don't give a damn as long as YouTube still generates ad revenue for them at the end of the day.

I think YouTube is already trying to do this with their "YouTube Heroes" program, which seems to be about trusting vetted volunteers more than random users.