How dumb is it that you need a law? In this dumb litigious society today, when people get sued for everything under the sun, I guess it's necessary to tell those dumb judges that someone has the right to defend themselves and their property, and shouldn't be sued should the bad guys get hurt trying to commit a crime, and to tell the dumb law enforcement people that victims of a crime shouldn't be treated like criminals because they defended themselves and their property. That's about how dumb it is. When the system has gotten so dumb that it doesn't remember and honor basic rights.
Getting off my soapbox, I'll relate a story about something that happened in Green Bay: someone broke into the home of one of the Green Bay Packers -- one of the running backs. He called 911 and they told him to lock himself in his bedroom. He did that, but then the burglar started to force entry into the bedroom. He unscrewed a bed post and when the bad guy came into the room he whacked him over the head with it. The story has a happy ending: no charges were filed against the Packer because the police determined he used reasonable and justifiable force in protecting himself. The bad guy is in jail with a very bad headache.
And the story just reinforces the fact that most criminals aren't too smart. Who would be stupid enough to break into the home of an NFL player?