I am not sure this is the right place, and maybe someone has suggested this before, but I feel like the Baltimore traffic is enough to have its own board? I get frustrated that people don't write whether they are posting for DC or Baltimore in their titles. I get excited about a new restaurant, but then I read it is DC.
I guess another solution would be to ask people on that board to start their post with either DC - <your topic here> or Balto <your topic here>. If I post this suggestion on the DC/Baltimore board, would you keep it up (even though it is not about food necessarily)?