In my experience, the vast majority of x.com links are unreadable, either an out of context message or some introductory phrase with no actual content.
I'd support such a ban, there are far better sources for that content, such as the link provided in this post.
HN doesn't enforce an "original link only" rule, and there are frequent URL changes to non-original content, mostly articles, which are more readable, or provide more information.
Simply put, x.com links seldom offer content for us to digest and comment on.
