Publicizing the movements of people in real time is not a good faith example of free speech. Banning such accounts is reasonable under any framework of ownership, public or private. There is no good faith need for anyone to know private information like this.

Blocking people from interacting with you on twitter is an exercise of free association, also a right embodied in the first amendment of the US constitution.

Freedom of speech is not the right to an audience, nor is it a right to stalk.