I'm using uTorrent, and I don't pretend to know a lot about how it works, but here's the situation. I'm downloading a very small torrent, and I only have a connection with 1 peer. Both of us have exactly the same data, and aren't connected with any other peers, so our upload speeds are both 0...
Um...
I can't answer the first half of your question (Islam, Judaism, Hinduism) because I wouldn't be qualified.
As for the second half... Is there any reason Christianity *should* acknowledge the existence of extraterrestrials? There are two explanations for why it doesn't: Either they don't...