Well considering I volunteered on the border of anacostia and pg county, I think most of them don't really give a shit, eastern ave is just another street in the neighborhood.
And yeah, is bet they would bear more resentment towards someone who lives in the Palisades than someone on the other side of eastern avenue.
Moreover, last I checked 10 years ago a good chunk of anacostia is transitioning into middle-income/federal employee Hispanic neighborhood and that process is bleeding over into pg county, because the boundaries don't really matter all that much.
Edit: southern Ave, not eastern ave; it's been a long time.