The famous social network site Twitter had to remove two promos face the pressure of an association. They could be harmful to the health of people with epilepsy.

The social networking giant Twitter has removed this Saturday two videos posted online promotions on Vine after receiving heavy criticism from the NGO, Epilepsy Action. As the name suggests, the British Association defends the right of people with epilepsy, and raises public awareness to their condition. The causes of epilepsy are complex, combining genetic factors to environmental factors. The crises of some patients may be triggered at the touch of images with vivid colors, and changes to flashing lights fast. This is “photosensitive” epilepsy. But the videos published by Twitter to contain sudden changes in light colors, and therefore could do damage if they had been watched by the sick.

The association estimates that, for a large company like Twitter, this advertising campaign was particularly irresponsible. With very strong words: “This video was dangerous for all people with photosensitive epilepsy,” Judge Simon Wigglesworth, deputy executive director of Epilepsy Action.

Twitter has quickly responded to criticism, on Friday morning removing videos implicated, leaving a total of only 18 hours online.

The Regulatory Authority advertising in the UK, the Advertising Standards Authority, sets out specific rules about this. Companies do not have the right to use “visual effects or techniques that could have a negative impact on members of the public with photosensitive epilepsy” in their advertising campaigns, although they appear only on the Company site.

Epilepsy Action has welcomed the responsiveness of Twitter and hopes to have used this controversy to better public awareness of the risks faced by people with epilepsy.