The Wrestler/Headscratchers


 * This troper works for the same grocery company as Randy. The name tag he uses can easily be changed, as those badges are blank and filled-in with a label maker by managers rather than custom printed. I know the manager is a complete douche, but seriously, it's actually within the stores better interest to simply make a new sticker with his preferred name than keep it, due to: 1) customers frequently address employees by name and Randy's ego would cause him to constantly correct anyone who refers to him as "Robin", 2) suppose his direct supervisors/other employees know him as Randy; wouldn't they get confused if a customer asked/praised/complained about some guy named Robin? 3) are other people in the store named Robin? calling him by his preferred name (or even as Ram!) could prevent confusion over loudspeakers or incident reports.
 * Like you say, I think it's just emblematic of the store manager being a pedantic Control Freak tool.