IMO I would say that 99% of the time these so called demon experiences are an over imaginative mind, and of course a seeking of attention, and isn't it funny that there is never 2 or more people who can say the had the experience?Prescription medication could have a part to play as well.
Hellrider LOL did the eggs come out sunny side up? Calico your right that demon attacks appear to have gone out of fashion.
But Poltergeist phenomena could warrant a different study altogether, but all powerful Demons ? give me a break!