This supposed attack doesn't work on Twitter either (or Gmail, or anywhere else I can think of). The full URL doesn't get linkified because of the very contrived use of Unicode slashes in the username portion of the URL.
This may be a twitter problem, but it is not a web problem.
Email (people have been told to look at the little popup that shows where a hyperlink goes for like a decade now)
Pretty much any chat application
Pretty much any website that allows comments, like HN
...the same email where you can modify links to appear as whatever you'd like anyway? Same goes for HN etc. This is overblown.
Like I said "people have been told to look at the little popup that shows where a hyperlink goes for like a decade now"