UFO stuff is pretty interesting, and like I said, it's naïve to think that in the entire universe we're the only game in town, but I don't believe that they come down to this planet to anally probe people, make crop circles or any other stuff people have claimed. I"ve read accounts by pilots, that seem sort of plausible, but I don't really put much faith into what people say. My parents, who ironically tried raising me ROman Catholic, always would tell me, believe 50% of what you see and 0% of what you read. And that always worked well for me.
The only thing that I truly believe in that some might say is a bit fringe is the whole JFK assassination. But I get really annoyed when talking to other people who believe in the same thing because they start bringing up shit like Badge Man, the shooter in the sewer, the limo driver being the gunman, Woody Harrelson's dad, George Bush, Howard Hunt, etc... Some of the theories are so ridiculous and unsubstantiated that it turns people off to any thought of a conspiracy. Do I believe that he was shot by more than one person, yes. The proof is overwhelming. Do I know who and why he was shot? Hell no! I have my theories, and I can make educated guesses as to why. BUt I would never be ignorant enough to say "This is exactly what happened!". I had some dummy on a message board tell me I was a Kool Aid drinking sheep, because I wouldn't say that LBJ was responsible for having Kennedy killed. Then after reading more of what he had to say, I realized he was just regurgitating some bullshit he heard Jesse Ventura and Alex Jones spew. That was his source of info! A fucking wrestler and a paranoid who just makes up shit for a living.
People can never seem to say "I don't know" when it comes to things that can't be explained, or that don't have a definitive answer. It's the reason the concept of a God/Gods was probably started. People just make up shit to account for their not knowing. As if saying I don't know is a bad thing. Sometimes it's the most intelligent thing a person can say.