I admit to doing this .. I do make a sour face when I see a 3 or 4 year old toddler sucking on a soother. I know parents in this thread will not appreciate this BUT a toddler should not be using a soother when the toddler should be using a sippy cup.
I agree, I think it's inappropriate for 3 or 4 or 5 years old toddlers using a pacifier.