It sounds like @Liam M did not have a choice when he went BBPC (bald by parents choice) at age 11, but since it was the "norm" in his family it probably was not a big deal for him.
I am a professional barber and I rarely see a guy that age with a shaved head. Most teenage guys are so terribly self-conscious and and lack self confidence that they don't have the cojones to try anything new!Personally, I think that a lot of my teenage customers would look great with a shaved dome and I wouldn't blink if they chose that as a hairstyle.