Back in my days we called those "tracking pixels" and it didn't even need a cookie. That's just not a real problem to solve. If you don't want to track users j

Back in my days we called those "tracking pixels" and it didn't even need a cookie. That's just not a real problem to solve. If you don't want to track users just giving each one unique ID is not a problem if you don't store them for future lookup. The fact remains that from client perspective client have no way of telling whether you track them or not so you can't really prove to user you're not tracking them.