Snare, you may have figured Metatron out. According to experts, conspiracy theorists typically have low self esteem, and the 'special feeling' of being right or superior they get from holding on dearly to their conspiracy theories fills the void. Arguments advanced by conspiracy theorists tell you more about the believer than about the event, so Snare you are spot on.
A healthy amount of skepticism should be a goal of all of us, but conspiracy theorists take it to ridiculous heights. Conspiracy believers are highly doubtful about information from the government or other sources they consider suspect. But, without criticism, believers accept any source that supports their preconceived views, which is what we see with Met's OP. And trying to reason with them is typically a waste of time. They and only they know the 'real truth,' while everyone else is mindlessly following the government, media, instituion, etc.
Experiments have also shown that conspiracy believers not only often subscribe to a variety of well-known conspiracy theories, but also frequently agree with an invented conspiracy. So yes, it appears that you can tell more about the person than the topic in this matter.
Sounds kinda like the Reverend on this site. Met and the Rev have a lot in common.