Reddit resurfaced a 10-year old story about a project gone so terribly wrong that it sounds truly horrific. Just one anecdote from the article:
One developer was given the task of checking why right-clicking on the interface completely froze the application. After several days of careful examination and incredible amounts of patience, he found out that right-clicking worked fine, only that it took about 45 minutes for the context menu to popup. Menus were all dynamically generated from huge (static!) content every time you right-clicked the main window.
It's almost impossible to believe that such things exist.
There also a follow-up post with answers to common questions.