Last I checked the 4th ammendment had not been repealed. No government agent may enter your house (or curtaledge) without probable cause suported by an "Oath or affrirmation" (search warrant) unless there is immediate action required to stop a crime. In other words a police officer if he sees someone about to kill someone may break in to save the person without a warrant or for example if he sees a drug deal going on through a window.
It's interesting you mention that, I was trying to remember that word; curtaledge. We had game wardens come onto our property once about 10 or so years ago. They were tipped off that we were hunting with machine guns and using salt blocks. The machine gun was legally owned and liscensed (but never hunted with) by one of the two owners who produced all his paperwork to the judge. I can't remember the whole details about the blocks but I think it was something with regards to they were mineral blocks, not salt blocks and were covered (that somehow made a difference) and weren't hunted over. Either way, what they were were legal compared to what the game wardens tried to bust us for. Anyways, the other owner happens to be a lawyer and argued Curtaledge during the case. When they were patrolling our land on 4-wheelers they came right by our cabin, not 10 feet away. Now, as I understand it, curtaledge is suppose to be our property where we reside, and arguing that that was what this was was a bit of a stretch, but the judge said the same thing you had (theownerbrought a court reporter with him for the hearing, we have the whole thing up at the cabin, it's a funny read, he argued circles around the G.W.) that they could be on our curtaledge on a tip off without a warrant just as if he heard that was a muderer on our property and came to save our lives. Eitherway it ended up being a mute point as the only thing they did get to stick was some beavertraps that were apprantly too far below water or too far above water.
Anyways, this would be my interesting tidbit to add to the discussion.