How do I stop people sharing my photos on flickr?

[alice123]

When people view my photos on my flickr, they're able to hover over tumblr, twitter, ect icons and share them. However, on other people's flickrs - who are not necessarily on pro accounts - have pictures that you are unable to share. I've looked and looked, but don't know how to prevent others from sharing my photos on their blogs. Would really appreciate knowing how to stop this happening.

[Nijis]

1. Click on the little arrow by 'You' at the top of the page

2. Click on 'Your Account'

3. Click on 'Privacy & Permissions'

The rest is pretty self explanatory

Hope I helped!