It’s a way of passive aggressively calling you out for shit and yea it’s rude as hell. I’d argue airing out dirty laundry to their friends at all is pretty rude regardless of if you’re present or not. I know I’ve had shit I’d rather people not know get out because of GFs gossiping with each other.
Corporations are scummy motherfuckers. Once they have this data they will keep it forever. Even if they don’t have a use for it now they can come up with something in the future and will have no qualms about fucking you over with it. The technology available to analyze it is only getting more powerful as time goes on.