Courtenay Semel, daughter of former Yahoo! CEO Terry Semel, is being sued by a security guard named Jaroslaw Jarczok. Jarczok claims that Semel cursed him out and assaulted him while she was intoxicated at the PURE Nightclub in Las Vegas in August 2008.Hollywood Gossip: Courtenay Semel: Sued! (October 30, 2008)