I agree with what Mr. Masse is saying. If a company is undertaking to send commercial e-mails to people, they have a responsibility to man the unsubscribed mechanism and make sure they're responding to people who want to unsubscribe. Think of a situation where there's a limited time offer and the company is putting out e-mail after e-mail to advertise it during a short timeframe. It might get frustrating for a person. After the third or fourth e-mail, the person might send a note saying she wants to be unsubscribed. We don't want to see 30 more days of this barrage of e-mails coming at the consumer.
Evidence of meeting #38 for Industry, Science and Technology in the 40th Parliament, 2nd Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was clause.
A recording is available from Parliament.