If Facebook is a barometer for the state of the conspiracy theorists (and since by my measure most of them are high school-college kids this is a pretty good assumption), then desperate is the best word to come to mind.
Our group has experienced a DRAMATIC increase in activity. When I first took over the admin position for our 9/11 group there were no debates, very few discussion topics, and some 300 members. Now there are close 900, and as John Ray pointed out, we are one of the most active 9/11 conspiracy-related groups on Facebook.
With this influx of activity, a few observations:
The sheer number of "9/11 WAS A CONSPIRACY 100%!!!!" posts and those like it. It's either out of laziness or hopes that some sort of provocation can come of it: neither of which are healthy, or productive methods of argument, even way to live a life. The need, the desire, to believe that the government was involved in 9/11, and other conspiracies, doesn't just reach "personal interest" levels, it skyrockets to obsession. The government NEEDS to be part of it. Why?
From a psychological standpoint, I would believe that someone who finds these conspiracies appealing would be feeling significant in their own lives. These conspiracy theories, and communities, empower the individual: doing research, creating videos, meetings, rallies, etc. It's a strong, albeit insane, community, that makes members feel important because they're part of something bigger.
The realization that there is nothing bigger, nothing other than what we've been told and have seen, goes beyond just being "wrong", for them it's destroying a necessary facet of their lives. To be wrong means to be insignificant. And that's understandably terrifying.
And at the same time, gloriously fitting.