UCK! But I don't know how true this is: “Parents wouldn’t eat with a dirty fork, but they often think nothing of picking a pacifier up off the floor at a mall and popping it back in their baby’s mouth,” We may get casual (lazy) at home, but I think a mall floor is pushing it!
http://health.yahoo.net/experts/dayinhealth/pacifiers-teem-staph-and-other-germs