Can I turn off sharing to Tumblr?
If you are concerned about images being posted to Tumblr there are a few things you can do to discourage this. It is important to remember however that if a photo can be viewed in a browser it can be downloaded or someone can take a screen shot and upload somewhere else. There is no way to 100% guarantee that your photos wont show somewhere else if you decide to share them. • Disable sharing on your account. This will turn off the share buttons on Flickr that let others share to different services like Tumblr • Hide your photos from searches on 3rd party sites that use the API. This makes it so that when a photo is blogged using Tumblr’s bookmarklet only a text link to the photo on Flickr is posted instead of the image itself. • If you are concerned about your images showing on Tumblr you may want to contact them directly.