Well, then it becomes damaging something that doesn't belong to you. Those jacks are usually just attached to the board with solder pins, and the jack itself itself isn't designed to hold the plug with such force that you could shear it off - you'd probably break the jack first. You could cut the plug portion off the body and jam that in, or even superglue it, but I guarantee you most people aren't smart enough to figure out why something like this happened and will spend a decent amount of time (and perhaps a service call) trying to fix it.