Like I said I don't offer this as proof, not trying to convince anyone of anything based on this site, just more for entertainment purposes than anything. Take it for what you will.
Because I believe in the supernatural my own personal opinion is that some of them may be authentic images of spirits/demons, but I wouldn't wager which are real and which aren't.
The site also has some 'ghost cams' that you can watch in real time, if you're really bored
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Oooga booga!