So a person calls your home, asks you if you have firearms in your house for a survey. The answer is? Well, for any and all gun owners I know, the answer would be "no". Because its nobodies business. How accurate do you think this survey is? Not very I say. There is also a Pew survey that asked, in the same manner as the gun survey, if they were online and if they browsed porn. 12% reported yes. Even Pew said this number was extremely low and demonstrates that any controversial survey of a personal nature is going to have highly dubious results even given Normal Distribution.