The Economist has a Johnson column on lawyers in the U.S. who call themselves "Doctor" because they have a J.D. degree. Apparently some states' ethical rules frown on this practice while others don't. The columnist comes down in favour of "common sense," which reserves that title for medical practitioners by and large.
Of course, in the States lawyers make great use of the Esq. ("esquire") label after their names to signal the fact that they are lawyers. So far as I know neither Esq. nor "Doctor" has had much traction here, Mr. and Ms. sufficing quite nicely. This may be in part because the J.D. designation is relatively new, the great bulk of lawyers still graced with LL.B. after their names. But competition being what it is, I'd be surprised if we didn't see some Canadians aping their American cousins and using the title of "Doctor" if for no other reason than to get a reservation at a busy restaurant.
Has anyone seen Doctors of laws here? Are there ethical rules in any provinces that touch on this, apart from injunctions not to mislead potential clients?