Having been raised in the Philly area I've heard this story from non-natives a number of times, so its pretty common. That said I think the flaw in this from a

Having been raised in the Philly area I've heard this story from non-natives a number of times, so its pretty common. That said I think the flaw in this from a positioning perspective is it shouldn't be an alarm that says "Danger, get out now!!!" like you're in a biohazard zone, its should be positioned more like a "Street Sense" radar. Basically you learned urban street smarts in the hardest way possible. Make this more about softening the risks of navigating unfamiliar urban areas by giving folks the same level of street smarts as a native, and less about a shock and fear-based motivator and you'll be on the right track. I would also consider focusing on safety by highlighting safer routes pointing out things like density of businesses and street lighting, police stations etc.