You can save time in investigating conspiracy theories if you just ask yourself two questions:
1. Would the alleged conspiracy have required a very large number of people to cooperate to pull it off?
2. How likely is it that they could all have kept silent indefinitely?
This immediately rules out the moon landing, WTC, and Newtown conspiracies for anyone who doesn't have a completely paranoid worldview.
Except dead people and residents have a bad habit of showing up as witnesses to other events:
Note to Obama/CIA/FEMA, hire new crisis actors each time.
“1. Would the alleged conspiracy have required a very large number of people to cooperate to pull it off?
2. How likely is it that they could all have kept silent indefinitely?”
In the world we are accustomed to true. But maybe it isn’t always as we envision it. What if there are confederations of very dedicated leftist who believe that they are doing the world a favor by helping to get rid of guns. What if they get a thrill out of fooling us. What if they have a pact that he who defects dies. Who knows they may even be devout Satan worshipers. Remember the bigger the lie the more people are likely to believe it.