I tell my mom, say don't open to anyone, everyone goes.Elderly people watch different programs about the perpetrators all day, but they don't take the role of victims on themselves.At least many.Open the doors to pseudo-gas drivers, water pipers, etc.I can't be around always,but! I bought a police suit and hanged it in the hallway to look.It worked.We came, greeted and dropped.But 4 apartments in our house went on that day.Buy your parents the right headscarves.