What you have described is not at all indicative of illegal activity. You just don't like what you see, and you're relying on your gut feeling. Please try to put this into perspective.

Imagine if, for whatever reason, someone didn't like seeing you in their neighborhood. How would you feel if someone requested a police patrol simply because of your presence?

I've been on the receiving end of police encounters because others profiled me as looking like a criminal. Trust me, it doesn't feel good.

If you witness real illegal activity, call the police. Otherwise, please mind your own business, and leave other people alone.

I hope this information helps.