Bear in mind that a case that isn't really clear are advertiser networks who work in the EU. Them collecting EU citizen data w/o explicit permission is illegal, and punishment is enforceable. Candy advertising network push girl the cookie banner?
But they can't. Because if the user doesn't consent, the advertising network is not allowed to even be involved.
And most sites don't just use one tracking network but they use many (see some of the convoluted cookie banners where you have to turn off data sharing with several hundred "partners")