Some ISP's and web site host providers won't even wait to listen to your explanation. Another problem with email advertising is that people simply change their email addresses all the time. Not to mention that some states like Washington have laws against sending spam. All that person would have to do is file a complaint in court which they'll immediately win. More money out of your pocket.
Nobody wants to buy anything from a bulk email anyway.
Yeah, you could get lucky here and there, but you'd still have to change ISP's and possibly get a new hosting service for your web site. Bulk email and excellent reputations just don't go together.