[zdrtx]

Subscribers can only see your public posts. You can still control the privacy of your photos, information, etc. by setting the privacy to friends only or friends of friends. You can also choose to not allow anyone to subscribe to you.

[liuliu]

Allowing people to subscribe you need you to opt-in first. It is not a default-to-opt-in thing.

[zacharycohn]

Ah, that info was not in the article when I read it.