I used to be Twitter, but dropped it years ago. Block allowed you to prevent people from commenting on your tweets as well as prevented you from seeing them or them seeing your tweets. They could obviously logout and view your tweets anonymously, but the most important benefit was if you have a nasty creep/stalker/asshole posting vile comments on your tweets, if you block them, they can’t do that any more. And believe me, even 8 years ago when I was still on Twitter (let alone now in this political environment) trolls were rampant.
I used to be Twitter, but dropped it years ago. Block allowed you to prevent people from commenting on your tweets as well as prevented you from seeing them or them seeing your tweets. They could obviously logout and view your tweets anonymously, but the most important benefit was if you have a nasty creep/stalker/asshole posting vile comments on your tweets, if you block them, they can’t do that any more. And believe me, even 8 years ago when I was still on Twitter (let alone now in this political environment) trolls were rampant.