similar to wrong side of the tracks, do you think?

this isn't universal--(duh helen!, haven't you caught on yet?) i've always known wrong side of the tracks.
do your bankers have red lining? it the new version of wrong side of the tracks.. they draw a line on the map, and no mortgages or other bank service beyond this line.
When we went to sell our first house, we found none of the potential buyers could get a mortgage. Red lining is illegal, but the bank officer, straight faced, said, oh no, we don't red line, but we don't offer mortgages south of Tremont avenue!