A word of advice to the legions of women seeking to disrupt George Clooney's latest extended fling with former cocktail waitress / sand enthusiast Sarah Larson: if you're planning on placing an anonymous phone call to George with the intent of disparaging his ladyfriend, make sure to use a pre-paid cell phone. Because even with the help of his cop/chauffeur's detective skills, Clooney was unable to track the hushed threats that were recently left on his voicemail, threats that apparently came from a rent-a-phone. On them, the anonymous caller ranted, "Dude, your friends asked me to give you a message: Dump the bitch before you're sorry!" The golden couple's reaction, plus reports from an alleged ex revealing Larson's penchants for "love potions", after the jump.