CHICAGOEver since being mugged by a black man, 28-year-old Caucasian Mark Weisner has become a racist, friends reported Monday. 'I used to be more trusting, but I learned my lesson the hard way in October,' Weisner said, alluding to the mugging. 'Now I'm a lot more cautious around certain types, if you know what I mean.' Weisner added that he has 'no problem with Asian Americans.' 