I'd be setting up neighborhood watches, armed, in the neighborhoods where this is happening. I'm in the south, small sleepy town, where an Arab would stick out immediately, so I'm not particularly alert here. When we were in CT and MA last month for 2 weeks, I found that I was much more alert to all sorts of things and people - almost jumpy. Guess you get used to it but it made me glad we aren't in the northeast anymore.