I had the opposite first reaction; give the conspiracy theorists a big dump of juicy mostly harmless nonsense to sink their teeth into, to get their minds off the more disturbing stuff, if only by a little.
They manufactured a conspiracy about some omnipotent leaker of facts and called this fictional character Q.
UFO facts from government archives might make them declare war on the Pepe frog or some other bananas reaction.
So while most people don't believe this stuff, it's not exactly fringe either. That's maybe a hundred million people who believe aliens are coming to earth, while Heaven's Gate was 41 people. Using belief in UFOs as the basis for a religion has happened a few times, but it's very fringe.