> Ha, nice find! I'm the Adriaan in adriaan.com. I'm testing some new script features that might improve deliverability. It's not sending any personal data. I use another domain to have the least effect of ad-blockers.

You are sending the user agent, path, referrer, a session id + the IP (which is automatically sent) to your personal server and also using a different domain to track users who have ad blockers installed. Even Google Analytics does not use random domain names to track adblock users (yet).