Lest ye think I'm being alarmist - or as X-Files' Mulder would say, "Just because you're paranoid doesn't mean you're not being watched," - you really need to watch your back when you travel.
My wife just called in from her Orlando business trip with news on this theme. She's a smart girl and follows my sound advice: double-lock the hotel doors, leave on the TV and lights, don't permit maid service, and etc.
Yet she reported, on her first night at the Disney's Grosvenor Hotel, that two men knocked repeatedly on her door at 2AM.
She says, "I looked through the peephole and saw a guy looking off sideways, not straight at the door. I heard him murmur to someone esle who said something back that I couldn't make out. Three times I asked loudly, 'Who is there?'. No answers any times, just more knocking. So I went back to bed.Eventually they went away. There was no way I was opening that door."
I'm glad. But she should have also called the front desk to send up security.
Neither she nor I have any idea what the 2AM incident was about, but she says her hotel room is accessible from the parking lot.
Not the most secure location for a room. A common access walkway like that is not as secure as an internal-hallway access. A higher level, and one facing the courtyard, would have been a better bet.
Related Article - read my common sense tips on Hotel Safety and Hotel Security.