It was a small group of people circa 2003. They added to the Dress and Appearance AFI as 'mutilation' and specifically called it tongue splitting.
All kinds of people go into the military for various reasons. Many to get out of some way of life back home regardless of how they feel about the military and US policies you know? They can get college paid for, cut ties with whatever or whoever, get a place to live, get meals taken care of, get money in their pocket and maybe learn a trade. Obviously, there's a lot of cons there too but some people see it as their best way 'out' of something.
Back then OIF/OEF was just kicking off and everyone was all 'Never Forget' so the AF had so many people they actually started taking volunteers for people to leave early and then started forcing people out (called Force Reduction), which is crazy with the shear amount of deployments going on but the AF also had too many NCOs as well. So yeah. Shit show as usual.