This sort of seems like a misuse of Github. Github is a place where individuals or organizations can store an actual product and the community can interact with and contribute to said product. It's not a place where one should solicit life advice or ask the community to perform trivial tasks unrelated to development or an actual product of any sort.
It's not that asking for this kind of thing is necessarily bad, but I think that it's inappropriate for Github. Quora or maybe HN itself would be a better forum on which to ask for suggestions about travel to the US.
Why? I don't see any reason that Github has to be that just because that's how most people use it. I find this particular project a bit silly, but there's nothing wrong with it as a use of Github.
It's not that asking for this kind of thing is necessarily bad, but I think that it's inappropriate for Github. Quora or maybe HN itself would be a better forum on which to ask for suggestions about travel to the US.