When Christine Smith heard the song "It's Hard Out Here for a Pimp" announced as the Oscar winner for best original song on Sunday night's telecast, she almost fell off the sofa in her Arlington living room. Deborah Veney Robinson of Silver Spring had pretty much the same reaction. So did Juaquin Jessup of Northwest Washington. "It was just like during the time when all the blaxploitation films were coming out with African Americans being portrayed as pimps and hos and gangsters," said Jessup, 51. "It was another example of how they pick the worst aspects of black life and...