Good and Evil Cookies
You need cookies on any site you log in on (or fill in a form etc), as stupidly HTML is stateless. This is good use.
A site blocking their images because you blocked their tracking cookie is malicious, bad. (Guardian and others).
Webmasters: Install adverts locally*. Install all scripts locally (ads do get used to serve malware as well as track), install web fonts locally*, only serve your own session tracking cookie, and only if a user is logging in. Anything else is dishonest, privacy busting, less robust and insecure.
[Locally means your own domain / server farm]
Dystopian novelists never imagined the lengths that corporations would go to, except maybe John Brunner (Shock Wave Rider) and Harry Harrison ("to the stars trilogy" and the Teddy short story)