If I were on "Lost" there are a few things that I think would bother me. Of course it would be terrible to live in constant terror and so on. As I think it through, though, one of the most disturbing things about being a castaway would be... what are they using to brush their teeth? I mean, they kiss each other often enough. I suppose they had to go through the wreckage and find bags that had toothpaste and toothbrushes in them. But that means they are using some stranger's toothbrush. Possibly a dead stranger. I don't think I would enjoy that very much.
I think I prefer a world in which there are plenty of toothbrushes for all of us. A world in which we have enough toothbrushes to do more than just care for our teeth.