This is the perfect hiding place, because nobody knows what half those cables do.
So, apparently, at some point the victim is supposed to find this piece of destructive technology you've secretly placed in their machine, say "Oh, you card!" and ... hand it back to you? Because if he, say, angrily steps on it and tells you to fuck off forever, you just lost $30 on a pretty shitty joke.
And if Proposition #297 passes, most of the skin on your back.
The device won't press "Enter" or close unsaved documents, because that would be too easy -- it's not meant to get your friends fired, it's only supposed to drive them to suicide. And hey, if you can get them to pick up the phone and dial the number for the suicide hotline, that makes them the perfect target for the next "hilarious" joke ...