This thread is misleading. I think the Question should be rephrased to
"Do you believe in people who claim to have seen aliens"
"Do you believe, aliens have visited earth"
"Do you think the UFO sightings are true ?"
Because nobody really knows if there is life anywhere else in the universe.
There is no proof of life, but on the other hand there is no proof suggesting otherwise.
The current question is like asking "Do you believe in God?"
There is no proof/data to support either answers.
BTW I think , people who claim to have been abducted by UFOs, are real Fucktards who don't have a life and are probably losers.