I've had one dream a few months ago where I was the alien. I was being catapulted through space and headed for earth. Then i split my consiousness into multiples in order to investigate and learn about humans. Memory is very vague tho, but i know it happened.
Some tribal people claim to have conceived hybrid children with aliens. I think they really believe that. I know of one source that i consider truthworthy where he had a dream of going to another planet. He talked with an alien and he had proved to him that he was in a physical vessel by limiting the best reality check. Breathing while pinching ur nose. He was actually unable to breathe when he pinched his nose, he then proceeded to coitus with an alien to make a hybrid baby. I don't know what to make of it. But it provides some interesting food for thought. And i don't think we can come to any conclusions without experiencing it for ourselves.
I'm having more alien dreams of late. Bizarre scenarios where two aliens are sitting on the couch with my family. Green looking creatures. A few days before this dream I had a dream where i was holding an invitation with a button on it. If you would press on it I would turn into a miniature spaceship. The last dream i saw a UFO (more like a flying blender/washing machine really..) pass trough the sky. I was with a buddy in that dream and I told him that the UFOs will be there as long as you believe they are, they are real.
I'd love to meet more ETs in dreams. It's on my to-do list for lucid dreams to visit other planets. I don't care if it's real or not.
But i think it is, on complex levels.
Btw, if our imagination is of non-local nature it makes sense that the best method for achieving contact across long distances is through that medium.