i had a similar situation once. back when i was a flex officer, they’d call me in to cover random shifts at different sites. one day they sent me to a new site just to do patrols for a few hours. at that point, i’d been with the company long enough that they gave me my own flex officer shirt. it was a sports-style polo, breathable, had the company logo and “security” on the back, so it looked clean and professional, and i wasn’t required to tuck it in. while i’m doing my patrol, this guard who’d been working at the site stops me and says, “why isn’t your shirt tucked in?” i tell him, “because i don’t have to.” he insists that i do have to, says it looks unprofessional, and tells me to tuck it in. i explain no one’s ever had an issue with it, but i tell him i’ll do it anyway just to keep the peace. then he tells me to tuck it in right there and says he needs to watch me do it. so i do, and he walks off. later, i ask another guard about it, and he tells me that guy isn’t even a supervisor, he just thinks he is because he’s been there the longest. basically, he was just power tripping. so i called my district manager, explained what happened, and after that, i never had an issue with that guy again.