Those of you that hang around here at DCist fairly often, and I certainly encourage the behavior, may have noticed that nothing generates a huffy, neverending comment thread like a good turf battle. We see tiffs between the central municipalities and the exurbs, between Washingtonians east and west of Rock Creek, and especially between D.C. and Arlington (an epic struggle indeed). Mainly good fun for, as our own Jason Linkins pointed out recently, cities are…