Actually no, you can call this BS or whatever, when a fight crew no matter on duty or off duty deadheading or commute, as long as they are in uniform, and you ignore the instructions and become argumentative, very likely you will be kicked off the plane.

It is not like this is something new, or did you forget a few weeks ago there was a long thread about a FTer being kicked off just because he took several photos inside the plane then start to talk back to the FA ? By no means someone taking photos inside the plane don't even apply to safety or regulations, yet the person was offloaded.