SMS at odd hours

SMS is becoming more of a nuisance than of use. You reach for your phone during meeting or while in sleep and what you get is a PROMOTIONAL SMS..this pisses you off..time has come when the operators must provide the user selected time slot for sending these types of messages. I know there are DND service, but still some would like to receive those SMS but at a convenient time. Simply put Promotional SMS's can still come but the time should be as per the user selected :-)