The bizarreness of Thomas' justification is pretty over-the-top. He's saying that an anonymous call creates probable cause because its not anonymous? The progression of that argument would be the government can authorize itself to search anything. A cop could just call 911, non-anonymously and even give his name, to create the tip that authorizes himself to search. Wouldn't that trigger the newly-created exception and make it legal?
Maybe there's some way that 911 calls could circumvent the 4th, but a not-really-anonymous anonymous call angle? WTF.