Oliver Pangborn hates Dave Matthews Band. If you looooove Dave Matthews Band, Pangborn probably doesn’t want to date you. If you share his loathing, eh, drop him a line. Gone are the days when it took a date, maybe two, to find out a person’s resume of likes and dislikes — favorite movie, favorite quotes, special causes. Online matchmaking sites rendered that notion quaint years ago, and now social networking sites are doing their part to obliterate it. “Facebook and MySpace are kind of robbing the mysteries out of dating,” said Pangborn, 30, who lives in Chicago’s Gold Coast neighborhood.