When you visit Twitter, or a web page with an embedded Twitter feed, information about you is collected by Twitter. This information includes your IP address, your browser type, your operating system and information stored in your browser’s cookies. This information can be used to identify who you are.
Because the internet we currently operate within is dominated by corporate interests, it is quite commonplace to visit apps and websites that collect our personal identifying data. However, as a group of people committed to thinking carefully and critically about systems of safety and security, we wish to create an online space that refuses the predatory, profit-driven mechanisms of the internet.
It is with this spirit and out of respect for your privacy that when you visit our website, we are presenting you with the option to take the risk of viewing our Twitter feed, or not.
Further reading on social media and data privacy:
riseup.net's Digital Security page
See, for example: What information does twitter collect? (CAUTION - this link goes to Twitter.com!)
See also: What we know about you when you click on this article (vox.com, also collects your data!) || If you have a Twitter account, change these privacy settings now (cnet.com, also collects your data!)