[LadyBrooke]

Aragorn is not the only one handing out warnings about speaking of Sauron. In FotR Gandalf tells Pippin to not call Frodo the Lord of the Ring because "Evil things do not come into this valley;but all the same we should not name them." So perhaps saying his name allows him to somehow focus on the person speaking of it. Names are more than superficial in LotR, Aragorn himself didn't know his true name until he was grown.