If you do not want to share your pictures on social networks can inactivate this feature in your preferences.
In your menu "Settings", top right of the screen, click "Preferences-privacy" and select the checkbox "Do not share partner sites and social networks".
Remember that we only publish thumbnails that link to your page or photo whose purpose is the dissemination of our authors.
Thinking that a sharper lens or more feature-infested camera will make better pictures tomorrow is the coward's excuse for not making a great picture today."
(Ken Rockwell)