Link Management

I don't indend to dominate the list; let me know if these questions are better
asked elsewhere.

I'm wondering how different CMS vendords and implementations manage links in
both structured and unstructured content (such as that greated by WYSIWYG
editors).  Specifically, what does the system do when users rename, move or
delete records?  If links are represented by GUID instead of path, rename and
move seem pretty straightforward, but that doesn't address delete or linking
by path.  I see a number of options that could possibly be combined:

-workflow process provides link report for manual review before publication,
prevents publication resulting in broken links
-on rename/delete/move, list affected pages for update
-published site disables anchor tag for invalid URLs

What am I not considering?
What are people using?
What is working?