Facebook – Does the person whose Facebook comment is hidden see that it is hidden

Facebook has access to all friendship-data on their site, even if you lock down the privacy settings. As an addition many users share their contact-book or even e-mails with Facebook. Most peoples have filled out their profile quite decent so it has data about your school, your employer, your current place, your interests and so on. Although Facebook states it does not use it, they can track all users (and even non-users) across many websites via the "like"-button which is transcluded directly from Facebook.

From this data it can calculate this friend requests.

Good question. Let me explain the answer one by one.

1. If you are the one uploading that photo, your privacy settings will apply to the post. If you've set the friends of friends settings, all the friends of your friends can see the photo, if you tag your friends in it. The exception is if you've explicitly excluded a person or list from the post. In that case they won't be able to see it, except if your friends reshare the photo.

2. If your friends is the one who uploaded the picture, his/her privacy settings will apply. The person you've blocked can see the photo, but can't see your tag in it.

3. Same as answer 1. He can't see unless the post is shared by one of your friends.