"There are growing concerns about the misuse of media and information that is not available elsewhere online as a tool to harass, intimidate, and reveal the identities of individuals. Sharing personal media, such as images or videos, can potentially violate a person’s privacy, and may lead to emotional or physical harm. The misuse of private media can affect everyone, but can have a disproportionate effect on women, activists, dissidents, and members of minority communities. When we receive a report that a Tweet contains unauthorized private media, we will now take action in line with our range of enforcement options."

What is in violation of this policy?

Under our private information policy, you can’t share the following types of private information or media, without the permission of the person who it belongs to:

...

NEW: media of private individuals without the permission of the person(s) depicted.

and

"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."

It is extremely bad dangerous road.