It's been mentione dhere beofre but I do want to reiterate that I believe the most common and WORST and most damaging gun myth is that "a gun owner is more likely to be shot by his own gun because the criminal took it away form him".
Its wrong on so many levels. as if criminals have superpowers that are not accessible to mere mortals that is part of its debilitating education to helplessness that makes this one of the favorite and worst lies of the liberals.
I heard a news program interview today with the father of a child murdered at Sandy Hook; Feinstein I think his name was. "A family member is 22 times more likely to be killed than a robber stopped in a house with a gun." "A robber could surprise you so there is no point having a gun at home." And here was a totally new one on me... To paraphrase him:
"It is a myth that criminals in the US kill people -- it is the law abiding citizens who murder people with guns in the US and the proof is that there are almost no guns in the hands of civilians in the UK but criminals can have all the guns they want and almost no one is shot to death."