I have slept in many places that people say are haunted and nothing has happened. I bring up the point of having slept in supposedly haunted places, because you are at your most vunerable when sleeping. People have claimed they have seen floating gray orbs, a ghost of a dead boy, hammers flying through the air at places that I have visited, and I have seen nothing. So, I don't really believe in ghosts; but I will continue to keep my mind open.
The idea that aliens travel millions of miles to "probe" us seems absurd; however, it is rather a large universe for there just to be us.
The amazing Randy has offered a million dollar prize, for years, to anyone who can prove they have psychic powers, and nobody has ever been able to claim the prize.
With all of that said, I do belive in an invisible guy in the sky who created us, angels, and demons. So, I may not be the best person to answer this question.