Any tips for shooting in low income / decadent areas, /p/?

I was testing out my new Lumix on a slightly older are of town. Long story short, was approached, threatened and almost robbed by four negro fellas for accidentally filming their car while it drove by, it was only by luck that a decent amount of people approached us and broke them off me. The fuckers made me loose my lens hood too.

How do I not get fucking stabbed and killed for wanting to shoot shoddy neighborhoods? Perhaps bringing a friend along next time could help?