In this thread, I will rate some of the most popular conspiracy theories and similar "alternative" ideas on a scale of 1-4:

1 Star (*): Ridiculous.

No reliable evidence, illogical, biim_a_gay_spammere, paranoid, hoaxed, etc. Can be safely dismissed out of hand by reasonable individuals.

2 Stars (**): Far-fetched.

Little reliable evidence, problematic arguments, logical objections, etc. Probably false, but not entirely outrageous.

3 Stars (***): Plausible.

No conclusive proof, but significant evidential support (circumstantial or otherwise). Debatable, but not unreasonable.

4 Stars (****): Near-proven.

Several strong lines of near-conclusive evidence, firm logical support.

So here's the list, in alphabetical order:

Alien Abductions: * *

Alien Autopsy: *

Area 51 anomalies: * * *

Bible Codes: *

Chemtrails: * *

David Icke/Reptilians: *

Erich Von Daniken: *

FEMA concentration camps: * *

HAARP: * *

JFK Assassination Conspiracy (any variety): * * * *

John Titor: *

9/11 Inside Job (MIHOP): * * *

9/11 LIHOP (Let It Happen On Purpose): * * * *

9/11 Official Story: * *

NWO/Illuminati: * * *

PNAC Imperialism: * * * *

Rapture: *

Sitchin/Annunaki: *

UFO visitation (of any kind): * * *

Whitley Streiber: *

ZetaTalk: *

Zionist Conspiracy: * *

This post may be edited to include additional ratings.