Could be dozens of actual ghost photographs on the Internet. We have no way of distinguishing them from really good fakes. Science only as good as available tools.
You assume that paranormal stuff am singular "it" but from my perspective it seem likely that it collection of different phenomena, some more mundane than others. Many ghost sightings seem to be reaction to infrasound, or to creepy surroundings. Tendency to imagine ghosts may have survival value if it help you avoid predators.
You not being open-minded like proper scientist. Not ask me what my experiences are, or whether me put them to the test of reason.