In the world of consulting there is an old saying - "An expert is someone who is more than 100 (insert your own number here) miles from their home."
And now many of us may give too much credibility to the "experts" on TV, radio, and the interwebs.
I know that based on the email forwards from my dad he gives too much credibility to the emails being forwarded to him.
Wasn't it said by Jesus that 'A prophet receives no honor in his home town.', or summat along those lines?