Lujan: It’s been admitted by Facebook that you do collect data points on non-Facebook users. My question is, can someone who does not have a Facebook account opt out of Facebook’s involuntary data collection?
Zuckerberg: Anyone can turn off and opt out of any data collection for ads, whether they use our services or not but in order to prevent people from scraping public information … we need to know when someone is repeatedly trying to access our services.
Wait, wait, wait… opt out for non-users? How?