Why Some Hotel Guests Are Wary of What’s Behind the Door of Adjoining Rooms

Hidden camera expert Joe Van Demark says hotel guests should be wary of adjoining rooms. He says even though the doors may be locked, an endoscope camera might be able to slip under the slot below the door. "Since you are not paying attention, you wouldn't know it's like a little snake," he told Inside Edition. Here are some measures you can take to protect yourself against someone peeping in on your stay.