Right, I read that but it's ok to link to sites that trade in illegal goods.
I'm not sure if that's a fine line or if that's totally ok in the mind of the ISP / internet community.

Also it says  illegal in buyer/sellers country if I remember right. If a guy in Amsterdam wanted to sell some hash (marijuana not a mining contract) to his buddy I'm assuming he'd be allowed to despite being illegal where the server is hosted (US I think)