I always assumed there was some tradition to cutting your hair short before going to war, because long hair would present numerous liabilities - more maintenance, potential visibility issues, potential to foil cover/disguise, and potential vulnerability in hand to hand combat. And there is a lot of military tradition to a short haircut, though I’m not sure how much is based on the above reasoning. But I’m not a historian so maybe this is just a bad interpretation of Mulan or a random teacher passing on low quality education.
In many states, if you have a gun anywhere in possession while committing a drug crime, even selling weed, it adds years of mandatory sentence onto the charges, often way more than the drug crime itself. I would be extremely weary of anyone mentioning anything about a gun and drugs together in a communication the cops can pin on you … because while they may be the nicest dealer you ever met, they are not the smartest.