Assuming high school kids and college/academy students should already know what it means because they are social media savvy won't cut it. If we are going to ruin a high school, or college, or service academy kid's life over use of a symbol that up until the last 2 years was innocent and part of a widely spread young people's game, then we better make DARN sure that every one of those kids has been expressly told and educated that they are no longer allowed to use this symbol and why. Was this symbol discussed at the cadet orientation? Is it listed in the school handbook under symbols that will get you punished/expelled? Otherwise we are creating a Kafkaesque situation.
According to a spokesman from the Anti Defamation League, "the vast majority of Americans are using the ok sign in the traditional nonracist ways."
http://www.chicagotribune.com/lifestyles/ct-life-ok-sign-racist-05282019-story.html
I've got to go. I have Christmas gifts to wrap.