Put up a sign!!!
"...Gun-related crime and accidents are a pressing issue across the country-violence affects us all. A No Weapons Sign and a bold graphic gives a stern warning that violence is not tolerated. A sign can warn visitors that such activity is illegal, even when you are not there. Protect your grounds with a range of heavy-duty security signs..."
(Hmmm...I wonder if there might be better ways to protect my loved ones.)