That probably happens a lot but that isn't always the case. Demons and spirits, ghostly activity are in fact real. You don't have to believe it, that's fine, but my own personal experiences and other peoples stories should be proof enough by now in this day and age. Some people just choose not to believe they exist out of fear.
Actually in this day and age evidence has become more valuable than believing everything you hear by default.
But yea, I've seen the Evil Dead trilogy AND 3 of the 'Friday the 13th' movies. Spirits and stuff are real, yo. I have DVD box sets to prove it.