Thanks for playing! Very true, but I think most people are either oblivious to the danger and do it anyway, or already know and avoid it! I think a genuine need for "don't try this at home" should never be necessary, but I guess this game acts in a way that implies there's nothing wrong with this and perhaps that's why there should be a warning?
As for things unplugging, perhaps this is what you were experiencing?
If a plug cannot reach the socket after 2 seconds of trying, it will unplug. But if it makes it, it will be permanently stuck, unable to come out.
I know this behaviour is not intuitive and it definitely needs changing, as you are not alone experiencing this problem. But it was just due to my lack of understanding how the physics engine worked!