Is believing in UFOs dangerous?

Considering how devoted some skeptics are to debunking UFO theories, it seems like some folks think it IS pretty dangerous. In a recent post, somebody brought up the Heaven’s Gate suicide cult, which is most notable because of how unusual it is— the threat of death by UFO cult is vanishingly small.

Government officials seem to think UFO investigators threaten national security? Or maybe UFO groups are being manipulated by political ne’er do wells?

To me, an interest in UFOs seems utterly harmless. It may create some anxiety in people, but I don’t see any significant fallout from allowing people to explore the topic in peace.

But I’m definitely open to counterpoints. Do you think believing in UFOs is dangerous? And, if so, what’s the worst that could happen?