1. Move to an area where you see people leaving stuff on their porch or lawn, and where as you go to shul in the morning you can see women walking or jogging. The preceeding are true of all the frum neighborhoods in Baltimore.
2. Avoid anyone doing illegal drugs. They tend to attract criminals.
3. Check the crime statistics (usually available online) and compare your neighborhood with others. Ignore dire warnings from anyone who might benefit from promoting fear of crime.
4. Avoid countries having or recovering from civil disorders as they usually have messed up law enforcement.