It's been a long time since Ming was 22, and Ming has never been in Scotland, so he has nothing to say on your points, but I doubt if the Scots are any different in attitudes (mutatis mutandis) than Yanks are as to heads haired or bared.
So, Ming says, "Do what you want." As to head shaving with a full head of hair--it's not a tattoo. If you don't like it, it grows back (two months hiding in the Hebrides should do it), and if you are fated for MPB in the fullness of time, well, you can say, "Been there, done that, no problem," when you go Sly for the rest of your life.