Los Angeles police arrested a 21-year-old Loyola Marymount student last night, 11 hours after an anonymous post threatening to kill "many people" appeared on a college gossip blog. "I am going to shoot and kill as many people as I can until which time I am incapacitated or killed by the police," read an entry posted Saturday morning on the user-generated gossip site JuicyCampus.com, according to the Loyolan. LAPD investigators and university officials traced the......