According to a recent report from the Organisation for Economic Co-operation and Development, developing nations cannot make any headway in the fight against spam.
Short on bandwidth, money, and know-how, developing countries are get pummeled much easier than places like the US. It [spam] is inhibiting unfettered internet use, and attracting spammers to set up shop in their lands. And entire ISPs in some countries are getting blocked by RBLs, like in the case of Costa Rican ISP Radiografica Costarricense S.A. (racsa.co.cr). Ouch.