NOT ON, YOU'RE NELLY: A bunch of protestors at pelman College in Atlanta managed to get an appearance by Nelly called off. They objected to his "portrayal of women." Hmm. But the appearance was part of a drive to encourage people to register as bone marrow donors. So, where does the greater good actually lay here? Getting the appearance caned isn't going to alter the way women are shown in rap videos and lyrics changed one bit; it may well have a small but significant negative effect on the number of marrow donors on the register. The protesting students can switch MTV off if it offends them; getting donors signed up isn't quite as simple.