The ghostery addon does that whole decline process automatically, and also randomizes data that is mandatory to use the site, to help hide who you actually are. I never see these popups anymore, and I have cookies set to clear on browser close, which I do at least once a day to clean up whatever’s left over.
A lot of people would play this as a game.
Just introduce internet controlled cart devices, gamify it, and you could make your workforce essentially free end enjoyable to participate in.