I'm a suspect because I worked in digital media in a media agency some time ago, and let me tell you that this is quite a broad request.
Why? Let's start by asking: what is targeted advertising?
Is it based on interests? Behavior? Demographic? Psychographic? Contextual? Placement? Geolocation? Search queries? The list goes on.
Even if they want to narrow it down to collected data from users, this still has a lot of broad aspects to it.
What about what Kantar and GFK, and many other market research companies do, where they track people who consent to be tracked and share their opinions and behavior, to generate statistical inferences? Because that's one of the ways you target on TV for example.
So, I understand where they are coming from, but this is such a broad request that's naive.
A company that sells vegan supplements that places advertising in the POS (Point of Sale) is targeted advertising - why should we ban something that has the consent of everyone involved?
Or the solution is to randomize ad placement? The amount of wastage and the play field would destroy anyone who tried to compete with companies who could afford mass media platforms with budgets in the orders of millions+.