I don't believe in the supernatural. When I see evidence for either that or for god, then I will take whatever seriously.

Ohferpetessake, check your meds & your eyeglass prescription!
Not because you experienced something odd, I have myself several times, but because you jump right into the "devil/demons" crapola..........not healthy! And if it was someone else, give them space...what's to say they suddenly will blame it all on you!?!??

I don’t believe and have never seen one. I’ve had one somewhat creepy auditory experience but by no means inexplicable. If I did see something I might think it’s like an echo of energy, or something to do with extra dimensions. Anything that appears like magic is just science that we haven’t figured out yet, that’s all I’m sure of.

When it comes to calling spirits demons that’s a subjective judgement call from either someone who believes what they saw seemed evil, or someone who believes in the supernatural but believes that it’s all the work of the devil. A lot of Christians are like that. Apparently Satan can do all kindsa crazy shit on earth but gods hands have been tied ever since his kid died. Go figure. But no the statement that “if there are demons there must be a hell” doesn’t follow. There are demons and no hell in the Hindu religion, and most anyone who saw an entity they couldn’t explain that seemed malicious would probably generally call it a demon just culturally, whether they believe in hell or not. Good news is neither exist, these are just terms that one must employ some poetic license to use with any sincerity at all.

It is human nature to attribute things we don't understand to the "supernatural" because we haven't yet found a rational explanation for them. Much of the "ghost evidence" is exactly like Big Foot or UFO "evidence" in other words manufactured. Human beings tend to see patterns even when they have to make them up in their minds and attribute them to ideas familiar to them personally. This is why people see Jesus in a piece of toast. Could there possibly be ghosts?... Perhaps but lacking real evidence I withhold judgement on the matter. If you have ever seen a illusionary lake in the desert you understand the tricks the mind can play on you. if you haven't had that experience try Googling "optical illusions" and look for images. All religious extremist cults have very high percentages of schizophrenics in their congregations who have either aural or visual hallucinations. The religious act of "speaking in tongues" has already been debunked as it is simply the person making strings of phonetic gibberish from their own native language in the same pattern over and over again but a believer actually believes they are speaking in a language only they and their god can understands. To understand the depth of this mental illness I met a person who used to be Presbyterian who told me they had their moment of clarity when his entire church went crazy over a bilingual guest preacher who spoke to them first in English and then after a sentence translated his words into Spanish.... They all believed he was speaking in tongues and that it was "god" making him speak in words they couldn't understand.... He was the only one their who knew Spanish himself because the rest of them were all small town and poorly educated....
The lesson is simple don't draw conclusions from lack of evidence.

I’ve seen some strange things( in one case, many others saw them too, over a period of years). No way to explain them, but I don’t believe spirits go walking around. Maybe an energy imprint of some kind? Who knows. I just view them as unexplained.

I hear ya ! When you've had an actual experience - or more than one, how do you deny the presence of some phenomena ? I've had a couple undeniable situations. I don't drink or do drugs, nor was I over tired, or hallucinating - and they happened anyway. Not scary, not devils, but SOMEthing far from the norm - definitely. So ?

And the most convincing one was later confirmed by someone who knew nothing about my experience ...

People always say to me, "I know what I saw..." But in reality, we know what our brains TOLD US we saw. I'm not dismissive to those who claim to have seen ghosts, but there is the aspect of the brain that must be considered as well, and the brain is pretty creative.

Since I am a skeptic, I personally don't believe in an afterlife or a spiritual realm. Therefore, I would need to see evidence myself with my own eyes. Another person's experience is not enough for me to believe it. And in the world we live in today, so much can be digitally faked that I also wouldn 't believe a photo or video of supernatural creatures was real. I also don't think of Heaven or Hell as actual places but as metaphors.

When my late wife died in our house in 2017 due to aggressive lung cancer,people say she left a Ghost,I have never seen it,others have,to sleep deep I take Melatonin tablets, and am out for 6-8 hours. They say she's in no pain and is watching,as in life she was a friendly person,so no lights are going off and on or other manifistations of paranormal activity, has been seen.

Tricks in perception. The human mind is quite easy to fool.