I thought having an ad campaign that targeted subgroups very specifically and boldly might be enough drum up public interest. Something like: “Hello $name from $city. How did $recent_embarrasing_purchase work out? I hope you enjoy your birthday in $birth_month.” And then a link to the proposed policy.
Unfortunately, marketers have neither scruples nor the ability to control themselves and have captured an asymmetric advantage. Technologists do what they do, preoccupied with whether or not they could, not stopping to think if they should. It seems like legislation may be the only remaining option.