Amusingly in their 2012 talk at Defcon CloudFlare talked about using Unpatched Open DNS Resolvers to basically reflect back against themselves until they all cr

Amusingly in their 2012 talk at Defcon CloudFlare talked about using Unpatched Open DNS Resolvers to basically reflect back against themselves until they all crashed as a way of mitigating a DDoS. The problem is the internet can't handle that much bandwidth at once. While every Open DNS Resolver would crash, so would the whole internet :P