Pants are a social construct.   True, but we need social constructs, norms and rules in order to function as a society. Otherwise, there'd be chaos. Would going without pants/unbuttoning your pants plunge the world into anarchy? Well, no, but people will think less of you if you're seen constantly with your pants unbuttoned. And it's their right to judge you for that because you're breaking a rule that society agrees should be followed in a public setting.  You're not being revolutionary for breaking these rules. You're just being an ass. Nobody except the idiot FA/tumblr/SJW sheeple will think you brave for leaving your pants undone in public.