gpilling - 2:36 pm on Feb 25, 2010 (gmt 0)
That is an interesting business plan. Comments on a NY Times article on the same subject echoed many "they tried it with us too" comments.
I would think that with some phone record analysis this would be pretty straightforward to determine. Business owners are claiming to have received dozens of phone calls attempting to sell them ads, and those calls will leave an easy trail to follow.