Pokemon GO: It's just a matter of time until some unfortunate soul finds their way by either 1.) falling off a cliff, 2.) in the midst of a crime scene, 3.) in some gang hangout 4.) the Middle East, or 5.) in a freak accident.
There have been reports of some drawbacks with that phenomenon, though not quite exaggerated as you mentioned. A person being run over by a car, luring in victims by pedophiles, and phone theft.