I keep an anonymous twitter account to tweet on one subject and to find out what is going on in the world in the subjects i am interested in. I set it up using an anonymous email address, don't use my real name, and never go in from my cell phone but they can track my ip number when I have forgotten to turn on the vpn so it is also not really private.

but only the government can get the ip address of an account from twitter and other social media companies. The same of course for posts here. There is nothing that is truly private and anonymous unless one takes very careful measures and gets it all right. At least that is how it is now.