(MARKETWATCH) — Jill Comfort, a Phoenix-area Realtor, had a good feeling about the cream-colored stucco house she planned to show her client, a young man relocating to the city from California. It was in his budget, in the right location and had a huge pool and back yard that would allow him to entertain.

It also had multiple surveillance cameras that recorded everything that went on as prospective buyers walked through.

“When we were walking out of the hallway we could see they were following us,” Comfort said. Both agent and client felt “awkward,” she added.

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