Some interesting bits:
"When we are notified by individuals depicted, or by an authorized representative, that they did not consent to having their private image or video shared, we will remove it. This policy is not applicable to media featuring public figures or individuals when media and accompanying Tweet text are shared in the public interest or add value to public discourse."
"We will always try to assess the context in which the content is shared and, in such cases, we may allow the images or videos to remain on the service. For instance, we would take into consideration whether the image is publicly available and/or is being covered by mainstream/traditional media (newspapers, TV channels, online news sites), or if a particular image and the accompanying tweet text adds value to the public discourse, is being shared in public interest, or is relevant to the community."