This will probably stir up the pot even more, but I was wondering about the possible legal ramifications of answering the door with a loaded gun. I am sure this would vary regionally and I realize most people said they have their gun hidden behind their back but there might be some scenarios in which you could be in legal jeopardy. For example, what if the police are at your door, conducting a house to house search for a dangerous criminal. Yes I realize this is unlikely, but didn't it happen in the aftermath of the Boston Marathon Bombing.
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I am not likely to feel threatened by uniformed police coming to the door, so that part is no biggy. And most of them would also answer the door armed, so also no biggy.
As for the other portion, there is usually a defense in state law, either by statute or case law. For example, here in WA, we have: RCW 9.41.270
Weapons apparently capable of producing bodily harm — Unlawful carrying or handling — Penalty — Exceptions.
(1) It shall be unlawful for any person to carry, exhibit, display, or draw any firearm, dagger, sword, knife or other cutting or stabbing instrument, club, or any other weapon apparently capable of producing bodily harm, in a manner, under circumstances, and at a time and place that either manifests an intent to intimidate another or that warrants alarm for the safety of other persons.
(2) Any person violating the provisions of subsection (1) above shall be guilty of a gross misdemeanor. If any person is convicted of a violation of subsection (1) of this section, the person shall lose his or her concealed pistol license, if any. The court shall send notice of the revocation to the department of licensing, and the city, town, or county which issued the license.
(3) Subsection (1) of this section shall not apply to or affect the following:
(a) Any act committed by a person while in his or her place of abode or fixed place of business;
(b) Any person who by virtue of his or her office or public employment is vested by law with a duty to preserve public safety, maintain public order, or to make arrests for offenses, while in the performance of such duty;
(c) Any person acting for the purpose of protecting himself or herself against the use of presently threatened unlawful force by another, or for the purpose of protecting another against the use of such unlawful force by a third person;
(d) Any person making or assisting in making a lawful arrest for the commission of a felony; or
(e) Any person engaged in military activities sponsored by the federal or state governments.
This is a complete defense, not an affirmative defense, so the conduct is completely lawful. An LEO taking action against a person whose conduct is covered by this statute would be in a really bad jam. Besides that - address safety first; litigate later.