But that's just the enviroment I live in. Again, overall the OP's right on and this is a great post to look at and think through. The two or more people 'hanging around' sharing looks/nods/jestures are not up to any good.
As for the two or more males driving around.......a group of military guys going or coming from a 'night out' is sometimes pretty obvious and thier not/wouldn't be scoping out a side of town they'd normally not be in. DD's (which has thankfully become the standard around our base......sometimes training does sink in) are most likely dropping off and wouldn't be looking for a felony to get into.
Paco is right, SA is life and the basis of trouble aviodance.
Again, great thought-provoking post.