To add to your list, Maksutov....

CTers either look for attention (i.e, the maker of "Loose Change") and thus make up a theory, or they are not socially successful, and believe that by believing in conspriacy theories, they feel as if they are part of a special, elite group that is above the rest of society.

__________________
I calculated the odds of this succeeding versus the odds I was doing something incredibly stupid...and I went ahead anyway. - Crow T. Robot

Godspeed, John Glenn. - Scott Carpenter

And these atomic bombs that science burst upon the world that night were strange even to the men that used them.
- H.G Wells, The World Set Free

To the conspiracy crowd, radiation is a big Boogey Man that inspires terror and death in all who encounter it. - JayUtah