Inconsistencies regarding the alleged hoaxes. 

The article includes three entries under UFO hoaxes.  Two of those entries have Wikipedia pages, but if you check those pages, there's no proof offered that they are indeed hoaxes.  (For Adamski's page, there is at least the fact that his claims about Venus, etc., are inconsistent with later observations.)

I think the UFO page should either mark these as alleged hoaxes or the Adamski and Meier pages should more clearly state why the preponderance of evidence points to hoax.  

Sorry, but I don't know the cases well enough to contribute the changes myself.