Democrats Boycott Question

Several democratic presidential candidates, including Barack Obama and John Edwards, recently boycotted debates sponsored in part by Fox News. The reason: Fox isn't fair and balanced.

Meanwhile, Imus is fired for his "nappy-headed hos" comment.

While these things may have previously been unrelated, we now have this: South Carolina State University, which is hosting an upcoming democratic presidential candidate debate, recently had a concert in which language was used that makes Imus look like a panzie.

My question: Will democrats boycott a debate held at a university that hosts performers whose language is littered with language much worse than Imus'? If disapproval is expressed via boycott, does failure to boycott indicate approval?