Fun fact, I used to work an ISP years and years ago as a tech support peon, but I remember a couple cases of police visiting us working child porn cases with subpoenas for a copy of our access logs for dial-in lines and our Usenet server. Both times the suspect was successfully prosecuted because we and the two other usenet servers he used logged activity, so we could demonstrate what posts he had made, when and from which IP.

Many Usenet servers, especially these days, require a user/pass to gain access, which is probably logged (like we did back in the day).

Also, since your profile contains minimal information the weight of your accidental bestiality hit is magnified. So for a lack of other things to show you, they show you ads for local donkey shows. Fill your profile up with more legitimate activity and that will become a rounding error.

Plus, it's associated your IP address, or some other aspect of your profile, not you personally. Which is the thrust of the rest of my response. The activity is associated with your clothes not the person.

Finally, your lack of profilable activity is in and of itself more profilable. "Oh, he's the guy that doesn't want to be profiled." Is more notable than "He's the guy that uses the Internet just like everybody else."

Weird usage patterns are one of the first things network analysts look to establish when tracking people. You for example, would be great to advertise to about security and identity protection products.