Yeah, we definitely don't allow that in my dojang.
Out of interest, have you attended the course in Korea or elsewhere. In Korea I feel they have the best instructors available, and the course is pretty consistent (I did it twice - 3rd Class in 2013, 2nd Class in 2016 and it was pretty consistent).
Also, the physical test helps at least ensure some consistency in poomsae quality, from what I heard the courses in the US have a crazy high failure rate (but that's anecdotal)
To be honest, I am too. I am by rank a GM, but if people call me GM, master or just Andy it's fine. I tend to use titles with my master level students (and they me) in front of students, particularly children, because it will help them have the correct decorum in front of visiting masters/guests - but I don't ever get mad if they just call me Andy
Indeed, my Korean is conversational level, but I've never bothered learning lots of common job titles, so I often forget (and as most of my conversations in Korean are about Taekwondo, I can stick to Sabeomnim and Kwanjangnim)
So if you were giving a talk at a conference, would you put your Dr. title or PhD postnominals on the slide or introduce yourself as it?
I don't know if you mistyped South or that's a specific region somewhere in the world?
I'm in software development and a while ago there was a big push to rename things to be more politically correct. Lots of them didn't stick and are now just back to the older ways (e.g. default Git branch, if your field of engineering is software).