“Dragon-kin” are just one of the many versions of “Other-kin,” where special little snowflakes and the mentally ill believe that they are fictional characters or animals.
“Dragon-kin,” however, have extra-special needs, specifically the “need” to eat diamonds:
Apparently parents oppress their children by not feeding them diamonds… if their kid is a "dragon-kin": http://t.co/JRuE9C9Ck9 #WTF
— The Political Hat (@ThePoliticalHat) November 23, 2014
Protip for parents: If you kid is eating your jewelry and believe that they are literally dragons, then they need mental help.