I did real estate for a couple of years. A local agent was raped while showing a vacant house in our town. After that, some general guidelines were adopted for agents showing properties. The prospective buyer had to come to the office first, show a driver's license, and leave his car at the office while he went with the agent in her car to the house being shown. This left the prospective buyer without his vehicle, he'd been seen by others at the office, his driver's license info was on file at the office, his vehicle and everything in it was parked at the office, the office personnel knew exactly where the agent and client were going, and exacty when the agent was expected back. No going on to other properties on the spur of the moment either, without letting the office know. The agent who was raped agreed to meet the buyer at the vacant house---she drove there in her car, he had his own car to drive away in after the rape, no one at the agent's office ever saw the guy or had any info about him or his vehicle. The big rule became "no meeting anyone at the property, they have to come to the office first."