That's why i said it isn't a preferred avenue of evidence. At this point, it's all we have. Therefore, all you can do is evaluate the person and his/her claim. But you should for the most part be able to tell if they have a mental disorder, are liars, were on drugs, mistaken, lying, deceived etc ("negatives"). If they seem very serious and don't seem to be the type to lie... you can take their claim for whatever you want. This evidence isn't the type of evidence to make one sure... it's far from proof. Although, it may be proof to the person that witnessed it... everyone else can only weigh it how they see fit.
What i am saying is that while i believe many people could be negatives. There is a portion of people that aren't those negatives and actually are good people telling you what they witnessed. To me, it's unlikely that everyone that has witnessed something paranormal be a negative person. For every lets say 20 people that are negative, 1 is potentially positive. Or you may think that ratio is less, all i'm saying is i doubt every single claim comes from negative people. All you need, out of every claim that has ever been said, is one person that is a positive. The implications of just one person witnessing paranormal phenomena is pretty huge.
I always phrase spiritual phenomena as more than likely than not - never sure. From what i see and hear, it sounds like to me there is evidence to at the very least suspect something is going on that we aren't aware of, and further, that this something seems to exhibit intelligence in some claims. If you are of the opinion every single one of these claims are not true... then, that is how you weighed the evidence. I personally think that is not a fair assessment of the evidence, but then again... i can't prove it. But for me there is proof (although i don't see it that way) as well since i have experienced stuff so i am privy to this bias. That is why i am sure not everyone is lying bc i'm not. I guess all you can do is decide if you think everyone is lying/mistaken and i understand why you would think so... i probably would if i never experienced anything. Or, you can be curious to what these claims could implicate. That's where i'm at.