These have been around for purchase for quite some and there isn't a widespread rash of these devices burning out devices. I'm sure it happens, however the same could be said for TVBGones, car hacks, Wifi Pineapples, etc. If you're in the mood to destroy something it's relatively easy to do so. It's just a matter of time. This is why current disposable design trends are so pernicious. A motherboard is relatively inexpensive to replace on work environments where this is likely to be the most used. Access to other people's hardware can be somewhat risky for most people. There's a reason why most crimes of passion are easily caught. If you're intelligent enough to use this effectively, you're generally intelligent enough to find a different, legal way of revenge.