1. The best gun control: Hitting your target!
2. Only an idiot would fire if they don't know where other family members are. 
3. Hollow point bullets expand as they hit something. The hole going in is about a third of an inch. If they go all the way through you, the hole on the backside is probably closer to 2 inches. They don't go through walls with any velocity. The chance of them going through the sheetrock, insulation, siding, wood fence, neighbors siding, insulation, then sheetrock is zero.