I am trusting by your screen name that you a PSU alum. I graduated there in '94.
Anyway, I was a Norwood 3v going on 4 when I had my first hairlift by Dr. Brandy in Pittsburgh. Having these scars and his crappy work, severly affected my life in a negative way for a decade. I am currently in the process of getting this fixed. I know how your son must feel right now. Being in college and balding is a horrible experience to go through. However, getting scars right now could make things worse.
If he does anything at all, I would go the route of FUE so he still retains the ability to shave his head without noticeable scars.
However, as others have stated above, it probably would be best to do nothing for now. If you would like me to talk with your son on the phone concerning this, I would be more than happy to do so. I dont want to see anyone going through what I have experienced at his age. My email is psusteven1@aol.com if you want to get in touch with me.
--steve