Photo stealing
There is no way to prevent someone from stealing your photos on Facebook or on the internet. If the photo is on the internet, people can steal the photo.
In Facebook, you can limit who can see your
photos. That will be one way you can prevent people from seeing your
photos but you have to make sure the ones on your friends list is
trustworthy.
Even if you use a program or a setting on the internet that will not
let you download the photo, they can still make a copy of it. There
is software like
Snippet
(click for info) that can capture
the photos even if the download feature is disabled.
Therefore any photo you put online is not safe from being stolen.