Every time this comes up, I have to point out that Facebook will collect information about you and build a "shadow profile" even if you never visit their site o

Every time this comes up, I have to point out that Facebook will collect information about you and build a "shadow profile" even if you never visit their site once. There's no foolproof way I know of to get them to stop either. Interaction with Facebook is voluntarily in the theoretical sense that you could try to avoid every website with a Facebook tracker or hope your ad-blocker is good enough to stop them. But Facebook won't respect signals (such as DNT) that would indicate that you don't want to interact with them.