They're enabled on quite some of the Linux distros. And if someone did not know the consequences of what they were doing when they decided to play with the reac

They're enabled on quite some of the Linux distros. And if someone did not know the consequences of what they were doing when they decided to play with the reachable/valid lifetimes on the prefix, they could end up with a lot of addresses. I'd love to know more on the origin of the story to understand how we can fix the defaults in IPv6 so they do not blow people's network - but I have a vague feeling someone played with them anyway.