There are attractive female agents that I know who try and bring their husband/boyfriend/brother to a showing if they don’t know the guy.
They bring a partner to an open house. And it doesn’t matter how nice the neighborhood.
A “NO GUNS” sign will actually attract illegal guns/perps.
That's what happened in the "Forensic Files" episode - the original agent brought her husband along. The perp walked towards the car, spotted the man, and high-tailed it. He cruised around until he saw an "Open House" sign, walked in and ended up killing the woman on duty.