Haha!! Only if you use it in the washroom and not in the common rooms where people are still sleeping.
Still, I do think it would come in handy to finish drying those socks that may not have dried overnight....
One of the beauties of the Camino, is that you don't have to do things like you do at home. At home, I blow my hair dry and straight-iron it, etc.... On the Camino, however, I would wash my hair in the afternoon and throw a hairband or a buff on it, and voila, au naturel hair, kinky/curly as it was!! Sounds silly, but giving up the act of having to groom my hair was very freeing!! Or, you could do what a friend of mine did which was to get a weekly blowout as a treat to herself, so that's something you could consider, instead of taking a blow dryer.
Having said all of that, some folks elect to bring along a luxury item, so I would consider this one. A lady I know actually took a tea-set on her Camino, so whatever floats your boat.
Buen Camino!!