We've had that discussion. There is a difference between data, evidence and proof. Paranormal investigators have difficulty finding the lines. I call things "goofy" when they don't really make any sense.
There is a lot of data someone can reference regarding UFO stories. There is no evidence. Evidence leads to a more profound understanding of an event or a phenomenon. None of the data contained within or related to UFO stories has done that -- it's not serving the function of evidence.
Even if we pretended that these types of things worked like police work or courtroom scene, as Paranormal researchers like to pretend, we've still got no legitimate evidence -- we just have data. In these types of scenarios, again, evidence leads to a more profound understanding of an event. You find a piece of physical data that is suggestive of an idea; in this case, let's say a red hair at a crime scene. That isn't evidence that the suspect is redheaded, but it is a piece of data that is suggestive of the fact that someone has been at the scene, at some point, with red hair. We now have a hypothesis, but we don't have evidence of the solution to that hypothesis until we have a new set of data. That new set of data would come from collecting a group of individuals linked to the scene by other data and testing their hair samples against the one we found. If you have a match, then you have evidence that the matching suspect was at the crime scene, but not evidence that they committed the crime. When you have enough data points functioning as evidence, you eventually build a proof -- a proof being nothing more than a reasonably objective interpretation of the evidence data.
More specific to this, If I said I saw you somewhere, that's a type of data providing circumstantial evidence of you having been in that place (i.e., no direct evidence of your presence, just my belief). If we then went to that location and inexplicably tested it for radiation, that wouldn't be evidence that you're radioactive or that you caused the radiation in the area (we just have the same circumstantial data). If 50 more people made the same claim, and the same set of tests were carried out, we still don't have legitimate evidence that you are radioactive, we have evidence that radioactivity is present throughout a localized area, for one reason or another. Until we find you and test you for radioactivity, we don't have evidence -- we have data that is vaguely suggestive of a circumstantial conclusion.
Pieces of data collected in relation to varied UFO sightings are not only all over the map in regards to what they might suggest, but they're suggesting those things into an abyss. Without the ability to observe a UFO, test it for radioactivity, reliably observe it causing burning damage to solid matter, or even see what's inside of one, the data collected at the scene of a UFO sighting is powerless and meaningless. It doesn't direct an honest observer in any direction. In other words, evidence goes somewhere -- it has a function and a purpose -- data is just a piece of information.
All you're describing is data. Data without the ability to aid in the understanding of an as-of-yet untestable, unknowable phenomenon. You can't use any of the data that exists on UFO's as evidence for anything, unless it can be tested against the claim for which it is supposed to be evidence. We've got data and we've got hunches; we don't have evidence.
UFO's are a thing people see. That's a fact. It's evidence that there are strange things in the sky. That's as far as we're able to get.