"Yes, but that doesn't mean that everything not mentioned in the Constitution is a right."
What it means is that EVERYTHING not mentioned in the Constitution as being a deligated power, or following into an area the Federal government has authority, such as inter-state commerce or international treaties, or raising an army, is OFF LIMITS to the Federal Government. All of those Federal parks, wildlife refuges, wilderness areas? ILLEAGAL - the Federal Governement is prohibited from retaining land, except for the National Capital, and military bases, and those are supposed to be less than 10 square miles. That's why Oklahoma had the land runs - the Feds had to get rid of the land. FAA? FCC? DOT? I don't see anything in the Constitution about airplanes, telephones, rail roads, or radio waves. The IRS? Let me ask you something -= if you aren't involved in interstate commerce or the export/import business (I venture to say that would fit most of us), and the governement is PROHIBITED from regulating you, how can they turn around and tax you? Taxation is a form of regulation! How can you file a 1040 and NOT give up your 5th ammendmant right against self-incrimination? Isn't the IRS part of the Federal Government? Unfortunately, the generation I am a part of has no guts and no spine - we don't desever the freedom our better ancestors died to give us, and we will soon lose it.
"It just means that one can't use the exclusion of something from the Constitution as justification for restraint. The Constitution doesn't specifically prohibit me from keeping your wallet if I find it in the street, but most people would agree I don't have a "right" to the wallet."
Not a federal matter - it would fall under what ever local laws govern the disbursement of lost property.
"Ditto stealing your car, breaking into your home, and so forth."
Unless I'm on an Indian reservation or military base, not federal jurisdiction. (A concept that has sadly been lost, thanks in part to the NRA's idiotic "Project Exile".)