We did overcome,'' said 29-year-old Luther Campbell, leader of 2 Live Crew, after the Miami-based rap group was acquitted on obscenity charges. They were arrested in Broward County, Fla., last June for performing a concert three days after a judge ruled their latest album obscene. Campbell celebrated the decision by getting drunk at one of the nightclubs he owns and spending the next day on the golf course. But he added, ''We ain't coming back [to Broward]. It's been really depressing. I don't feel safe here.''