From TechHive:
In many cases, DRM can be get kind of silly, and it can completely shape the way you use the digital media you purchase. DRM might make you think twice about how many devices you can still add your iTunes Library to, or which computer will get a shiny new version of image editing software.
Luckily there’s no DRM on any physical objects like a cup paired to one person’s mouth. That is, there wasn’t until a group of hackers put together a chair that self-destructs after eight uses.