The problem is of course that it will not have any effect on a burglar wearing gloves. And gloves are pretty standard burgling equipment. And its highly illegal. Often the penalties are worse than breaking and entering so you could be committing a worse crime than you're trying to stop. However if you want to make something shock without killing, buy an electric fence energizer from your local farm supply and hook it to ungrounded metal bits. Touching it will give a highly memorable shock. This might burn down your house and is no way a good idea, but you can't say I didn't answer your question.