I'm Pro-Legion in this regard. I think it's a decision of living a tough life with the Legion or not living at all. It actually took me a playthrough to support the Legion. At first I was Anti-Legion (just ask Caesar's limbless body) but I began to see them as ruthless protectors. Now, Obsidian did kind of put them in half-assedly and they're probably not the most fun faction to play as, so this is more about who you believe would do better as leaders of New Vegas in teh realz lyfe.
And I apologise if this thread has actually been done and I haven't seen it, I just find it a very interesting topic.