This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
From a usability point of view, wouldn't it make more sense to change the link into plain text (manipulate the DOM to strip the <a> tags) rather than disabling the link? Otherwise you end up with confused users wondering why your link doesn't work any more, despite looking like it can still be clicked.