Are we honestly alone?

Here is something I guess I should ask everyone: Do you believe we are alone in the universe?

Here is another novel idea; maybe Earth is just a dropping off point for those socially unacceptable beings or criminals the extraterrestrials no longer want on their planet. Maybe Earth is actually a giant penal colony on what was an uninhabited planet and was established as an underdeveloped portion of the Universe, to detain "cast outs."