People would have lined up to do it at the start, but would the enthusiasm last long enough to go through thousands of hours of video? Are they accurate enough?

People would have lined up to do it at the start, but would the enthusiasm last long enough to go through thousands of hours of video? Are they accurate enough? And how do you protect it against trolls deliberately doing it wrong? It's easy to catch the kid typing in four letter words, but if serious trolls put a bit of effort in, they can probably dodge most automated filters.