Twitter recently announced that it will no longer allow “the sharing of private media, such as images or videos of private individuals without their consent”.
In practical terms, this means photos and videos can be removed if the photographer has not obtained consent from people captured prior to sharing the item on Twitter.
Individuals who find their image shared online without consent can report the post, and Twitter will then decide whether it's to be taken down.
According to Twitter, this change comes in response to “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”.
While the move signals a shift towards greater protection of individual privacy, there are questions around implementation and enforcement.
Twitter has said images or videos that show people participating in public events (such as large protests or sporting events) generally wouldn't violate the policy.