well, I live right in that area, near BWI.
I fel helpless because I don't have the means to shoot back, even though I have to agree with jag on this one point...I would not just randomly return fire into a blind range. I wouldn't take the chance of hitting someone else downrange.
But I don't do anything differently. I mow the lawn, I wash the car (at night so the water cops don't catch me) I walk my dogs and make my friends kid gas up my car.
I do not fear the sniper. I take some comfort in knowing that he'll never be taken alive. He'll (notice the assumption of masculinity here) either kill himself when cornered or he'll be shot "trying to escape". Either way, he won't waste any more taxpayer money.
Brian