I've seen a lot of "laxed" haircuts from MIDN/Academy types. At my ROTC unit we were held to the Navy reg standards, which don't seem very lax to me. They standards actually seem pretty detailed and strict, but to each their own.
http://buperscd.technology.navy.mil/bup_updt/upd_CD/BUPERS/Unireg/Chapter2.PDF
With all the MECEP types hanging around at my unit, it has been a "better than standards" kind of mentality wrt grooming standards. Not saying that there aren't MIDN who look $hitty....I can think of a few for sure