What an interesting thread.
Steve, thanks for including the info about the flag patch. I had completely forgotten all about that. Some of us have been wearing them for forty years, which was a decade before I learned they were a breach of etiquette. I've since forgotten. I need to inform my students of this. Some wear them, some do not. They are allowed, but not mandatory.
I'm surprised you seem to have gotten resistance from posting the info. I thought it was great, again, thanks.
We originally put them on our uniforms because we were students of American Karate. As a police officer I had one on my sleeve from my entire career. There's an American flag at the front of the dojo, always has been. Fought on a U.S team back in the day, overseas. We wore those full American flag gis. Wallace was on the team as well, as a fighter/coach. The gis first showed up in 74, when the PKA broadcast their championships on American network television.
I never liked those damn gis - didn't like the fit of the pants at all. They were low riders, don't know if they still are, or if they're even made anymore. They looked kinda cool, though. At least at the time.
As for patches, one of my gis has four. The school patch, the flag, the patch of one of my student's school and a patch of a Ju-jitsu organization I'm part of. My other gi tops have two, school and flag. If a student wants to wear a patch from another organization that has been part of his life, that's fine with me. I appreciate his respect for those that helped him on his journey and like the fact he honors them.
I will always wear a flag patch on my gi, despite the breach of etiquette. It traces back to my youth, we used to stick American Flag decals on every damn thing. It was big back in the fifties, which was only a decade after WW2. Besides, being an old guy, I love my country and hate it's government. The patch is a gentle form of rabble rousing to me.
As for uniforms, we wear black ones. You can also wear white when you make green belt, or mix and match. If you make black belt you can wear whatever you want. Like below. (My black belts from a dozen years ago). A motley group if there ever was one. But all ladies and gentleman.