The thing is, when you call someone who believes a conspiracy theory a whack job, or some other negative pejorative, and say they do it to feel superior, I think you could be the pot calling the kettle black and your missing the point.
Is everyone that believes in a conspiracy theory crazy? Is everyone that believes a conspiracy theory totally unreasonable and unwilling to discuss alternate points of view? How many and which ones are reasonable to believe in and what are not? If you say you don't believe in any conspiracy theories, are you being reasonable?
Take for example, 9-11. Obviously the official story is a conspiracy, since it involved people working together and conspiring to do those things. Has the official story been proven beyond a shadow of a doubt? if you say you believe it happened just the way the government says it happened, you do believe in a conspiracy theory...it's just that you believe the official version and are therefore accepted by polite society.
It seems like you could safely say that that the Queen of England is not a blood-thirsty reptilian and that a person that believes the David Icke stuff might need more education or a shot of Haldol, but can you say for total certainty that there have never been any false flag incidents in the history of the U.S.? Or that corporate interests don't influence politics or hide egregious actions? That billionaires don't collude for their own interests? Or that the NSA always has our best interests at heart? That the people in charge always follow the rule of law and put the national interests first?
Going along with the party line all the time could be just as unreasonable sometimes as some of the more crazy theories out there. I think you always need to use your critical thinking skills. All through history,there are plenty of examples of people buying the political propaganda to their detriment.