last CloudFlare DDoS demonstrated, that 300Gbps is no longer some magic barrier for attackers. given such throughput, you can easily drop country like Poland from Internet. of course, immediately such concepts like ‘critical infrastructure’, country financial stability come to mind. i’ll be one of the panelists of RIPE 66 meeting dedicated to BCP 38. it’s one of the things (implementing BCP38!) that you just have to do, to make sure internet is safer. of course closing open resolvers is another one. take care of your network hygiene! and big FIBs! and 100GE interfaces!