Here are a few of my pet hates - In no particular order.
1) No physical evidence.
2) Only anecdotal evidence as a source.
3) Not allowing the examination of raw footage (remember that stupid Alien Autopsy).
4) Supposed experts - who's background cannot be verified.
5) Making very over the top claims.
6) Testimonials.
7) Releasing it directly to the media
8 ) Not allowing a proper "peer review" process.
9) Ulterior motives - selling you a book, crystals, magic ball or whatever (making money).
10) Making false promises (such as healing with no scientific basis).
11) Selling false hope to people (that's how a con works)
12) Multiple evidence form the one source (ie - too many UFO pics form the one person)
13) Bad evidence that cannot really be tested for authenticity (blurry photos)
14) Evidence presented by an anonymous source
15) Claims that cannot be possible or go against the laws of physics (perpetual motion, etc.).
What are yours?
R.
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"Extraordinary claims require extraordinary proof." - Marcello Truzzi