I am not agreeing with them, and don't like the word "buggy" but several pieces of core internet tech' are broken in various ways. BGP is a "trust" system wher

I am not agreeing with them, and don't like the word "buggy" but several pieces of core internet tech' are broken in various ways. BGP is a "trust" system where you just assume your peers tell the truth and action their routing changes accordingly. http://en.wikipedia.org/wiki/IP_hijacking#Public_incidents http://en.wikipedia.org/wiki/IP_hijacking#Public_incidents DNS has no spoof protection and due to UDP can be used to DoS third parties by mislabelling your packets and requesting large records. SMTP has no built in way to verify the sender actually works for the domain it claims to work for (see SPF and DKIM as potential workarounds). Everything is being worked on and improved. But the broken stuff is still a large party of the internet today.