But why? What does this get him? In two years (say) he will be interviewing somewhere, and sitting across from him will be the person that had to deal with the

But why? What does this get him? In two years (say) he will be interviewing somewhere, and sitting across from him will be the person that had to deal with the aftermath of that 5 minute patch. Or, it could be the person that had the pleasure of working with his refactored code. Which situation is better for him? Not to mention that this situation is not the fault of the company or his coworkers. Why should they suffer? I don't see a single thing that this attitude will accomplish other than "vengence", which in my book is something to avoid, as appealing as it may seem at dark moments.