User-supplied data isn't necessary for tracking and advertising, just more convenient. Obfuscatory methods can stymie this to a degree, but the average person n

User-supplied data isn't necessary for tracking and advertising, just more convenient. Obfuscatory methods can stymie this to a degree, but the average person neither understands nor wants to deal with those. Common tracking methods like tracking pixels and share buttons can be avoided at the client level, but the most popular clients have begun to use side channels to evade DNS-based blocking (with which one can protect many), while browser extensions are again not understood or used widely. Networking is simply an inherently unprivate activity, there is no way to talk to an endpoint without that endpoint being able to know something about the other side. There is no way to prevent the middle-men who route the messages from knowing where it came from and where it's going, and if the same entity has control or visibility into a large enough portion of the network, to identify the endpoints.