I know what you're saying. There hasn't been physical evidence about UFO's officially, and those that were found were ALL said to be forgeries (just do a google search for "alien artifacts" or something and I'm sure you'll come across a plethora of pictures Billy Bob took in his backyard of a piece of alien wreckage). Of course, we can't take these seriously, and it's understandable to be extremely cautious and skeptic especially the UFO craze of the 60's where everyone had been taken to Venus or something. Same thing with all that crap from Area 51. What's true, what's not? Who can say for sure?
UFO's like ghosts or sasquatch or Nessie or whatever, is just a way for the everage joe to have his name in the local newspaper or on tv, and I understand why we must be cautious. But I still think that, considering many people throughout the world, from different cultural and social backgrounds, from different times in history, have been reporting more or less the same things. Disks in the air moving at insane speeds, skinny aliens with giant black eyes, etc. They most probably originate from some guy who made up this cool story, but what if, WHAT IF, these things were actually about real aliens?
Imho, you're as much a fool if you completely dismiss everything as if you accept everything literally. Life isn't black or white.