I guess they're just added for tradition then? Superstition maybe? Obviously it's not for liability since everyone seems to hold the UX designers liable here.

I guess they're just added for tradition then? Superstition maybe? Obviously it's not for liability since everyone seems to hold the UX designers liable here. They're meaningless when they're meaningless, context matters. As I said in another comment, if you are approaching a missile strike drill the same way you approach your FB ToS then YOU are the problem.