Is it against Marine regs?

Is it against Marine Corps regs to wear desert cami pants with name tape still on without full uniform and looking like trash?

Tonight, while waiting for class to start, this guy in my class walks up to the teacher. I look at him and notice his pants and note that they look an awful lot like Marine desert cami's. Because he's wearing no belt and his pants are hanging down, he reaches to pull them up, lifting up his black jacket a bit so I can see there's still a name tape on them (said "Lemone" or something similar). As he's sitting back down I see he's wearing a loose black shirt, not tucked in, so not full uniform. After class, I see him walking to his car and the pant legs are dragging the ground (It's also wet from the rain).

I wanted to call him out for looking like garbage while wearing a piece of the Marine uniform, but didn't want to look like an moron since I'm not sure of the Marine regs (I'm a Navy veteran, a bit rusty on my regs), since I'm not sure if you're allowed to wear the uniform like he was wearing it.