I think there *is* a certain amount of disdain surrounding acne, depending on how bad the skin is. However, it is ridiculously insensitive for anyone to point it out to the poor guy. I can't believe how mean some people can be. Your friend should consider that girl to be a bullet dodged.
You might suggest (privately) that your friend see a dermatologist. They can really help with acne problems and can help to prevent permanent scarring.
Relax... I'll need some information first. Just the basic facts - can you show me where it hurts?