Really. Who cares. If you don't want people to link your tweets, why post them to Twitter in the first place?
They should delete them and put them on a blog and block HN traffic like what petulant characters such as jwz has done. Even then one can still screenshot and upload the whole page and paste the link here and they will still get upset over it.
In general, do what you want with the links you post here as long as they don't break the guidelines.