As gossip websites buzzed about Gwyneth Paltrow and President Obama — her “you’re so handsome that I can’t speak properly” is already being mocked unmercifully — her Los Angeles neighbors lashed out Friday that the Paltrow-hosted presidential fund-raiser had come at their expense. Traffic stood still, children were stranded at school, residents could not leave their own driveways. That’s not the way life is supposed to be lived in Mandeville Canyon. In a post on the Nextdoor Mandeville Canyon website, a private social network for area residents, Bret Lewis said that the neighborhood did not need people like Ms. Paltrow...