Well, I'm just saying that websites that focus on loli or shota are obviously going to attract pedophiles, so you just watch who goes there and how often. You're right about privacy, but come on, if I visited Stormfront or The Daily Stormer or an Islamist website every day there would be cops putting me on a watchlist, so if we're doing it for political extremism, why not for pedophiles ? Unless there are no watchlists at all and the NSA/MI6/etc. are just sitting on a pile of useless data. Which may be the case, lol.
Nobody in the U.S. at least would put on a watch list just from visiting an edge lord site like The Daily Stormer. The police have much better things to do than worry about who reads a shitty site like that. That type of data would be useless since you would just be watching who was coming and going from a site, with no indication that any of them were a threat to society. Law enforcement are looking for people who are active threats, like people who go overseas to countries that are active hotbeds of terrorism and openly support terrorist activities. They don't have the time nor the resources to monitor the every extremist site on the internet for no reason.