Facebook can use your pictures to make facebook ads and these ads appear in your friends facebook page. Although facebook admins have posted a article on facebook blog that they have stopped such activities but still there is a chance that they may use it in some way or another.

Here is very simple procedure by which you can prevent all your pictures to be appeared in facebook ads.

PROCEDURE:

1. Click on “Settings” up at the top.
2. Select “Privacy”.
3. Then select “News Feed and Wall”.
4. Next, select the tab that reads “Facebook Ads”.
5. In the drop down box, select “No One”. Then save your changes.