http://www.protectingdesigns.com/bmw-group-files-suit-against-turbosquid
I find this a little odd.
I would have thought anything that can be done to maximise your brand exposure would have been a good thing.
I guess not.
Either way it's a reminder to us all to take copyright and patents seriously. The nature of our medium can make us feel distant from real world things like law suits and liability, but unfortunately it's just as much a consideration for us as those that create tangible products.