USB Prank Device - Your Office will hate you
Oh dear god. We know the office can be a boring and draining place, but when the IT guy asks if he can "email some files real quick" and pluggs this into your computer, you are screwed. This is by far the best way to wreak havoc on your office, and ensure that your co-workers will hate you.
This little stick of joy has many functions to make sure your victims PC is totaly un-usable. Once plugged in, the unlucky PC that it's attached to will have its Caps Lock enabled and disabled at random, see garbled text splattered about quarterly reports and be victim to uncontrollable, erratic cursor movements.
This does not take it too far though, the Enter key is never activated, and open windows, and programs are never closed to ensure it is all in "good fun". The gizmo starts at $33 (£19.99) and it will be back in stock soon!