miander2

You can tag anyone on Facebook even if they don't have an account. When you start typing their name a drop-down box of suggestions appears. Hit the escape key and you can continue typing their name and tag them.

Anyone with your photo can associate it with your name on Facebook even if you don't use it.

Exactly. We cannot have any expectation of privacy in public and likewise, we cannot have any expectation of privacy in online social media.