The U.S. is “advising…increased caution” for U.S. citizens while overseas. The State Department is a bureaucracy, and how would it look if bad things happened and they didn’t warn people? Now that they’ve done so, bad things aren’t their fault.
The State Department advises that you register your travel with them and… follow them on Facebook and Twitter. That’s hardly advice that, for now, is going to scare me off from travel.