Curious, feel kind of sorry for him.
And frankly, everything I've seen come out of rap-genius suggests that this wasn't culturally aberrant there.
Complimenting someone's writing doesn't mean you endorse their actions, and the killer's sister being attractive is relevant when the killer was motivated by sexual frustration. Sometimes we need to talk about things, even though people might be offended, or, in Gawker's case, act offended for attention and/or page views, another way of exploiting tragedy.
Another example: http://history.genius.com/Kurt-cobain-kurt-cobains-suicide-n...