Bill alone at home hears a beep through the baby monitor, when he investigates the beep he finds the spy camera and looks around to discover all of them.
Previous internet-wide scans by security researchers have turned up millions of insecure embedded devices in printers, routers and yes, even baby monitor units.
There may be concerns about privacy since conversations may be picked up on a scanner, baby monitor, cordless phone, or a similar device on the same frequency.