One forum I frequent automatically replaces Twitter links with nitter.net, which still isn't great but at least lets you see the post.
In the specific case in Xitter, I perceive that as a good change. I like seeing what was linked to, without otherwise getting engaged there.
Not having any context is the part which makes links to xitter useless, most of the time you get a link to a reply but without context it’s difficult to impossible to understand what it’s about, and the link is functionally useless.
I would not. First, I would assume logged users do get context so they likely are not even aware of the issue, and second that is what link for, if you have a to quote everything you're linking to in full then the web is broken.
xitter is what's broken.
problem solved for good