, 9 tweets, 4 min read Read on Twitter
Today the ACLU sued the FBI, DHS, and five other federal agencies to learn more about how they monitor social media users and speech. But local law enforcement agencies have been very active in this space too. (Thread)
We have already seen how local police spy on social media users. In 2016, we discovered records showing this practice was widespread here in California. medium.com/@ACLU_NorCal/p…
Across America, local law enforcement have monitored activists, protests, and religious minorities. A few examples:

Baltimore: theverge.com/2016/10/11/132…
San Jose: eastbayexpress.com/oakland/oaklan…
Boston: bostonglobe.com/metro/2018/02/…
Memphis: theappeal.org/memphis-police…
This map by the Brennan Center depicts how widespread social media surveillance already was back in 2016. brennancenter.org/analysis/map-s…
Vendors have marketed monitoring products to police, touting their ability to monitor Black Lives Matter and other activists. aclunc.org/blog/surveilla…
In 2016, the @ACLU_NorCal, @ColorofChange, and @Mediajustice revealed how vendors had built surveillance software for police by exploiting developer channels on Facebook, Twitter, and Instagram. aclunc.org/blog/facebook-…
In response, Facebook and Instagram banned developers from exploiting user data for surveillance tools. Twitter doubled down on its own similar ban. wired.com/2017/03/facebo…
But even with these changes, law enforcement’s desire to conduct surveillance of social media users has only increased. Every month we hear about new govt initiatives and vendors offering to help.
The public deserves transparency into federal and local social media surveillance. But it doesn’t stop there: social networks share responsibility and must do more to stand up for users and their data.
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