As we move to IPV6 I'm sure we'll see more of these security issues that'll need to be resolved. RA-Guard evasion. (This is a classic case where I discovered this through +Ethan Banks shared GReader feed (http://goo.gl/lHNm9)and shared it through G+. I would so love for some integration there, although I can understand the complexity to making this happen) - Phil Ashman