How could anyone find out which sites are you following using an RSS feed?
And I mean in a broad way: can the site track you? Can ISP? Network managers?
Let's say you want to follow a bunch of political sites that you don't want to be easily attached to, is RSS a good way to do it? Are there extra precautions to take?
My first thought would be that it's the same as using any other browser, so not a great way to be private. Am I wrong?
Keep in mind that RSS is just some XML sent over HTTPS connection. For anyone outside, it will look like gibbirish, they can say you are requesting and getting some things from that particular site but not what it is.
An RSS feed is literally the same as going to the website. A request is being made to the domain and anyone who can see the data between you and the website can see it. If you think you're secure going to the website normally, then an RSS feed would be secure, too.
Privacy is not an aspect of an RSS feed. It's just a list of items in a standard format. Your reader requests it from the server, the server sends it. That's it.
Depends on your threat model. If you use secure DNS and https for the RSS feed, then these people would know your IP and the IP you're connecting to:
the DNS provider
the RSS server
your ISP/ VPN server
Your ISP or VPN will know you've made a TCP connection to that server at a specified port, but that's it. It's trivial for them to reverse lookup the IP back into a name.
Only the RSS server will know the specific URL you're visiting though.