The first and second floor are vulnerable to burglars and rapists. Americans traveling overseas tend to be friendly and unintentionally give away personal or sensitive information. Don't pack your pepper-spray canister in your luggage, because air pressure may cause it to leak and run out on your clothes. If you're flying, I suggest you buy a canister at your destination point, and if you don't use it, give it to someone as a present when you leave. The aerial view allows them to pick off burglars and rapists before they get anywhere near you.
Public bathrooms are notorious for their tendency to attract perverts, snoops and thieves.
Groucho glasses are always worth a pocket in your Samsonite. The growing employment of private eyes by spouses makes them especially useful during those romantic outings with your paramour. Like the pepper spray canisters, these also make a great parting gift when you leave for home. Finally, remember that caution is the best defense. Just because the SWAT team has promised not to shoot, and just because the people on the megaphone say they'll do their best to ensure your safety, that doesn't mean it's safe to leave the house unarmed.