Perhaps if you had just lost everything you owned along with your home, if you were starving and near dehydration, watching sick people with no medical care die around you, with no power, no air-conditioning...if perhaps you had no idea where your loved ones were or if they were alive (or worse, the full knowledge that they were dead) you would understand why thousands of people dead and tens of thousands of people facing homelessness and unemployment you might understand why this is not a joke, not something for cutesy little emoticons.
To the OP -- I'd say use common sense that you'd use anywhere else. If you feel uncomfortable, go with your instincts. Stick to lighted paths, and never, ever be ashamed to go to guest services and say you need an escort if you feel unsafe.
(edited to remove quote from deleted post -cd)