RT @zeynep@twitter.com

Facebook inserts tracking data on *all* pictures uploaded to its site. I believe they have been doing this for a while? It's one of those things that they probably consider normal operating procedure but few people outside the company have any idea this is going on. https://twitter.com/oasace/status/1149181539000864769

🐦🔗: https://twitter.com/zeynep/status/1150102489401716736