As a judge, I see some thighs with skin on and some without. I don't judge any differently between the two. Usually I can't tell if it has skin or not during the Appearance scoring and only find out when I take a bite. I'd much rather have a skinless piece than a thigh (or other piece) that doesn't have good bite-through skin!
I judge it as presented.
CMJ - KCBS & NCBBQA
CBJ - MBN, NCBS, NCPC, & SBN
OBJ - BBQCritic.com
CTC - KCBS
Pitmaster and chef - "4 Lil' Pigs" Competition BBQ Team
Author of "A 'Q' Review"
Lang Hybrid Smoker, BDS, & Holland "Epic"