A BracketedLink that has a wiki word in it will show up as a broken link if a page for it doesn't exist.
With the above two examples, the output on this wiki is:
I think we could live with this. It soon becomes somewhat ugly if one has to look if a WikiWord in a page is really a link or not. BracketedLink are one thing, <nowiki> the next and maybe more. --MarkusLude