A Vendor Lock-In is when certain software is developed to be incompatible by design with other software that have similar functionality. It is used to establish a monopoly. And any such function is malicious.
This comment thread is for people to document various implementations of this malicious feature.
There are more than one crash in Moria's Race. But the most exiting ones happen during the race of the movie. And because this kind of thing was hard for me when I was starting out with Blender, I suppose it will not be a terrible idea to write about how I did it.