When it comes to conspiracies, I like the UFO ones, especially Area 51. I'm guessing that it's a combination of the following (with percentages of each):
1. Secret government projects (<43.9%)
2. Supernatural stuff (God, angels, demons, Satan, etc.; I'm guessing about 0.1%)
3. Real alien UFOs (probably >56%)
4. Hoaxes, which are very annoying, because they ruin the statistics. I don't know the percentage of those, though. Hopefully <1%
I wonder which galaxy (in the observable universe) looks the most like the SW Galaxy. I bet they can see ours.