"nor be deprived of life, liberty, or property, without due process of law; nor shall private property be taken for public use, without just compensation." This the relavant part of the 5th Amendment. Kindly show me where it gives gives one person the right to use another's property without the owner's permission. In fact this section of the amendment, though directed at the Federal government, is a continuation of the English common law concept of private property.
As to No Firearms Allowed signs, at the moment and as written, failure to obey them does not constitute a violation of law. However, if the wording "Anyone violating this ban will be considered to be trespassing and may face arrest" were added, it could make it a very different situation indeed. That wording would add a "trespass warning" that may make a verbal warning unnecessary prior to arrest. Also, there isa presumption of a blanket invitationfor members of the public to enter a business establishment. No such presumption exist with regard to a private residence. Your right to carry a firearm does not trump another person's right to control their property and its use in the manner that they choose.
But, that is legalese. The whole point is that if you are going to visit a friend or acquantance while armed, it is simply good manners to make sure that they have no objection to your being armed in their home. Why would you want to cause someone, especially a friend or acquantance, distress in their own home? As to how the would know that you had a gun, how about printing or flashing? The point is that if you want others to respect your rights, then you have to respect theirs. If you are unwilling to do that, well than on your head be it.
