The only 'search' that I see as reasonable without a warrant is the 'pat down' when a suspect is apprehended. This is reasonable for officer safety.
But that's it. A pat down. Arrest him and get an order if you have a case to be made against him.
The other 'exception' isn't really a search and that's when the cop hears a cry for help. Again, he can open a closet to see if someone is in it, but he can't look in drawers and briefcases and such.
Beyond that, I don't see anything else that would dictate a search without a warrant.
And if you don't agree with me now, you really are stubborn. LOL
BTW, I was going back and forth with someone a few weeks ago. This person was being disruptive and I didn't want to let his crap go unchallenged.
Someone sent me a private message telling me that this poster would never be convinced. I explained why I continued to respond and he said that he admired my tenacity.
I told him that most people aren't as nice. I'm usually just called a stubborn bastard.
Sometimes is it worth enduring a troll (ie, Moj***) to preach to the lurkers.
I have actually seen some fence sitters moved by seeing how the two sides debate and display their positions.
Those who have to lie to support their views don't have views worth supporting.
And reasonable people can see the same thing differently and still stay reasonable.