I'm not sure which army you're talking about! The new breed of Warrant Officers do care and expect to be saluted.
I fear that this sort of response is the result of feeding large numbers of U.S. children genetically mutated corn over the course of a childhood.
We are all well aware you are a Troll and not a 'real' Warrant Officer in the U.S. Army or Navy. Some of us here were, and some still are 'real' Warrant Officers so we know what a 'real' Warrant Officer expects.
If by some strange quirk of fate you are indeed a Warrant Officer, it should come as no surprise that you have chosen the wrong military career path. Instead of going Warrant you should have become a Commissioned Officer. Commissioned Officers in the U.S. Military are gentleman by Act of Congress. Warrant Officers are gentleman by birth. Warrant Officers do not need a salute to confirm who they are.
I would be inclined to ridicule any Pom who saluted you.