Yeah, the book has the ones they did pursue where are the volumes that they didn't? Considering the population of the US, average Joe can be safe that he will more than likely not be targeted unless he is a criminal or maybe pisses off the wrong guy.
Stay clean and don't worry the law of averages is on your side. I speak from the viewpoint of a narcotic officer who participated in several lawful wire intercepts and knows first hand there are not enough hours in the day for us ( all law agencies combined )to chase everyone we can build a case on much less John Public who had some small item that flew into our net.
When some you know/love ( child ) shows up on a porn site and you get pissed don't cry sour grapes because they perv can't be caught and tried.