Google’s YouTube has partnered with Facebook, Microsoft and Twitter to create a central database of flagged Terrorist content that would allow the partner organisation, and those who subscribe to it, the ability to share and identify terrorist videos and images posted to multiple sites.
The group will be using the unique hash of each file to make comparing content easier. Each of the partner organisations will share all of the existing and future infringing content to the database and the other members of the group, including other sites who sign up to the service, will be able to review similar content and apply their own policies for content takedowns.
This is a great initiative however in the constant battle against extremism and radicalisation that is being fought all over the world we hope this is the first of many technological solutions to the issues that instant cross global communication platforms has created. We also need to be aware of what each companies policies are in relationship to content takedowns. Facebook famously banned images of women breastfeeding until recently.
Few reasonable people would object to reducing violent extremist content online, however there is the ever-present slippery slope between reasonable user protection and censorship.
From what I understand, a single pixel difference would change the hash right? So you could change that for each image you are going to upload. Some of them a pretty social media/tech savvy.