Junk science is not an "alternative explanation" or an "unconventional idea", its just pure crap- pernicious crap as well.

For an example of something TRULY frightening, consider the gullibility of people who accept this sort of bogus nonsense, and that these same people have the vote, produce offspring, and may hold positions of influence and power. Now, that's scary.

Sagan's Demon-Haunted World and Shermer's Borderlands of Science are worth a read.