Alasl, Bartoolguru, we can't change the laws of physics. Anything powerful enough to go deep enough into a home invader's body to keep him from hurting our loved ones, is powerful enough to go through sheetrock walls. Frangible bullets like the ones you ask about are demonstrated in the "Make Ready" video available/downloadable from http://www.panteaoproductions.com/
That's why I've taught for so long that tactics supersedes hardware, and the home defender needs to have a plan in place that will put him or her in a position where when shots are fired, THEIR shots will have a safe backstop, whether it' a massive bookshelf or a pile of cartons of solid material or whatever. Of course, this in turn means that the shooter has a solid plan in place to ensconce where they'll have a backstop behind the intruder...or move to a position where that will be the case... and loved ones in the home, or innocent people in the adjacent apartment or condo, will be out of the line of fire.
Much harder to achieve than magic bullet technology...but, unllike magic bullet technology, POSSIBLE to achieve.