Personally I think that people who have a problem about the wearing of insignia by others have more of a problem with themselves.
There is that.
Two members of a syndicate I'm in both have "problems". One works as a flying instructor so is seen on the airfield in white shirt and bars. The other feels more comfortable in an ex-military nomex growbag.
I am a little tired of getting caught in the middle when they have stupid little spats about it.
That I don't wear bars, and sometimes but not always a Nomex suit is my personal choice: so are theirs. Why the heck these two can't calm down and just get on with the flying I have no idea.
G