@SquireOfGreenway
I have only seen one apparition and I have no idea why but then I am not actively seeking out or studying this issue in any way.
These are questions to ask those in the "field" of studying this phenomena rather than those who have seen or claimed to have seen one.
There have been some interesting photos taken if you do a search (and a whole bunch of made up crap!) and again who is to say these "ghosts" are here all the time? I have never believed that there are "Ghosts" walking around us all the time.
Regarding the question as to why they are so "elusive" could be the same reason why gorillas were thought to be "made up creature". Gorillas were only discovered when someone went to actively seek them out.
Until something is actively studied in a scientific setting/ manner and it can be "proven" of their existence the majority of people will not believe something unless they have visual or evidence based data.
But then people that have or claim to have had a "visual" experience of this phenomena are considered by those who have not had the same experience as having a mental health issue/ brain disease or disorder or be as thick as shit.
It's the same as whether "Bigfoot" exists. Some people will believe because they have had a sighting, some will believe based on recent hair and blood sampling done, some will believe because they have seen a foot print and some will only ever believe if they have a dead one to touch and feel. Some will never believe even if one is a live capture.
Mr BC and I are very sceptical of most things unless we have scientific evidence (is the Earth flat? No it's bloody not!) but seeing something that should not have been there and should not exist in the confines of what is known is a very strange experience to say the least.
Hell we tried to research the shit out of what we saw to try and debunk or confirm it but we are still; at this time; left scratching our heads.
At the present time trying to "scientifically" prove that "ghosts" exist is tricky because the whole point of a scientific experiment requires that you can re-create that experiment again and again for it to be proven and so far they have not managed to do this at the present time. But going forward, who knows what they will find?
But then what do I know? I'm apparently unable to think critically or I believe in a bunch of drivel or have something wrong with my brain.