@WhoopassGirl Yeah, it's very situational. To play devil's advocate, I grew up as a very socially awkward individual, I could easily see myself failing to pick up those social cues and overstepping.
I feel like if they used it once, letting them know it's not okay would be the right approach, and however the person responded to that would then dictate the rest.
I've got a peculiar relationship with my name(s). You could call me Susan if it made you happy, I wouldn't care.