Empirical data is important as evidenced by the fact ASACP Data Indicates 99.9% of Validated CP Reports Are Not Related to Adult Entertainment Industry (
http://www.asacp.org/press/pr062405.html).
We all know this and so does the government. However without data, we had no proof. Now we do!
Also, what was interested about the prior info. All the ISP, Domain registrars or billing companies were mainstream and the government know this, too.