I don't know if they pierce ears or not but I don't think I would get my dd's ears pierced at Disney. Piercing hurts and your ears are sensitive for days afterwards. Disney is a place you are always moving and putting harnesses on for rides. I just don't think it would end up being a great experence.
Wow! I wish I knew if they did - I would have had my daughters' ears pierced there! I didn't find that any of my daughters had any problems after getting their ears pierced so I would have had no problem getting them done at WDW. What a cool souvenior!