Re: Worry, our data aren't as effective as we told you
You don't even need to click on an ad, or buy anything. Advertising is clever, subliminal. The point of all this Facebook scandal is how the data (allegedly) could be used, and how clever designer advertising could be used to change opinion, or even voting habits. It's what's on the screen that you 'ignore', or may not even actually consciously register that is the worry. Just saying "I don't follow ads", or "they don't affect me" is what they want, because it gives the illusion that you are in control.
And how many of us that "ignore ads" actually do see one in a hundred that are "now, that's interesting". Out of the billions of users, your click through along with a tiny proportion of the whole audience is just what the sellers are looking for. Seemingly though, that activity is now secondary.