Those are largely ineffective in the modern world. Most bot nets, like he mentions in the blag post, come from 1 IP address only 1 time. With thousands to tens

Those are largely ineffective in the modern world. Most bot nets, like he mentions in the blag post, come from 1 IP address only 1 time. With thousands to tens of thousands of IP addresses in the bot net, there is just no way to block by IP address anymore.