It's a serious offense in many parts of the world to remove that button, as it is a little known CIA / NSA tracking device and microphone to help them monitor and control the world's population. It's not a lightning conductor as many people in Iowa USA believe.
It is no accident that many people in China refuse to wear baseball caps intended for markets outside China.
But if it is bumping your head , by all means remove it. Buying a pickup truck with higher doors would save you getting out the cutters and risking spontaneous uncommanded hat disassembly.
Probably be wise to line the hat with aluminum foil though, to prevent the "missing button tracking rays" from CIA / NSA satellites reaching your brain.
Edited By Jeff Dayman on 03/08/2020 20:32:36