Legal Ethics and Marketing

According to the CBC, a Canadian chapter of Mothers Against Drunk Drivers is disturbed by the advertising of the Impaired Driving Office on behalf of criminal defense lawyers interested in impaired-driving cases. The ads appear on city buses in various Canadian provinces, but have been taken off of the buses in at least one city as a result of the complaints lead by MADD. The issue represents competing policies. Does the advertising give a green light to those who might drink and drive, or does it help people obtain legal counsel when they've been charged?