I can see lots of people out there exploiting this aspect of the IPV6 until the IDS industry gets their code up-to-snuff. Wouldn't surprise me in the slightest.

"Because most security hardware appliances and host-based intrusion detection programs have not been programmed to inspect IPv6 packets in depth, data can bypass most network security, said independent security researcher Robert Murphy, who presented the tool at the DEFCON hacking conference last weekend."