[gfodor]

This reminds me of people who would re-sell search query data via aggregation of google referrals across a network (usually ad based.) In general, if there's a way to get that kind of data (search data is gold due to the ability to mine it for adwords niches), you can presume there are people out there who are going to skirt right up to the line of acceptable ethical behavior to try to aggregate it to sell it.