I think I would have to face this one alone. I don't think that there would be many people who would want to help me be one of the ten survivors. That said, I don't think I've managed to piss off anyone to the point where they would seek me out among a crowd of hundreds if not thousands of Floodians. I would probably run around burning all the alts, newfags, and infrequents until there are just a couple hundred people left. Then, I would use my shotgun to search buildings for weapons and supplies. When the number drops to about 50, I will go out and hint down the last few survivors. If anyone wants to ally with me, I will not decline, but I don't see that happening.