If the contents are "sage", don't bother creating an actual link. Seems people don't bother to mouse over and check what the link is when the vast majority of the time it leads to "mailto:sage".
Of course, you might want to come up with another indicator that the post was saged.
Whoops, maybe I was insufficiently clear. The purpose would be to draw emphasis to posts with genuine links in the link field.
"mailto:sage" is kind of traditional, though.