my friend Sinner Coolio dennis the hacker did this in 2001
he shut down ebay amazon yahoo microstf even hacked military bases lol
https://steemit.com/hacking/@ackza/my-late-friend-dennis-moran-aka-coolio-aka-sinned-the-master-computer-hacker-who-hacked-multiple-military-and-corporate-web

he had a botnetready to take down the entire DNS servers and nOONE would be able to get o any ebsite! haha he would ahav costthe world hundreds of billions!