Every political group attracts a few crackpots, but no group attracts as high a percentage of crackpots as groups with unpopular opinions. Outcasts are drawn to fringe groups — and fringe groups have little enough support that they don’t want to alienate any potential supporters.
I’ve been aware for a long time that libertarian and some conservative groups attract crazy people. Many times, these crazy people are highly intelligent, very weird and often obsessed with something strange. Those folks aren’t generally going to be accepted among the mainstream parties, because those groups have plenty of support and it’s easy to edge the weirdos out. But fringe groups accept the weirdos more readily.
And why not? One of the core libertarian beliefs is that people have the right to be whatever they want to be. If somebody’s life centers around promoting drinking colloidal silver to cure every ailment under the sun — or trying to communicate with aliens or researching conspiracies about how the Bilderbergers rule the world — hey, that’s his business, even if he’s nuts. As long as he agrees with us that other people have the right to believe and act as they choose, he’s welcome in the “liberty tent.”

Suppressing speech you don’t like is a lousy way to encourage tolerance
Unexpected meeting forces me to believe I might fall in love again
Sudden realization of hunger for taste of kindred soul is killing me
Tradeoffs about values leave me feeling like ‘double-minded man’
National sugar daddy? Warren Buffet wants to give us money … sorta
A tax on folks who can’t do math? Winning may be worst possibility
Do we really need so much ‘stuff’? Do we own it? Or does it own us?