65gtoman: I would suggest that you consult with your local police. Yes, you have the right to hold and bear arms, within certain narrow parameters. If your state doesn't have a legal concealed carry law, you can be arrested for concealed carry, even though you have a right to hold and bear arms. If you answer your door with gun-in-hand and the door-to-door canvaser for the Cancer Fund becomes frightened, has a heart and dies, you may be charged with negligent homicide. You may only answer the door, armed, if there is a situation of imminent danger, where you fear for your safety. The burden of proof does not lie with the person who knocks at the door, irrespective of the number of signs you have posted. You have the right to charge them with misdemeanor trespass, but that's it!