http://y5wnzw4e6i7srm2gqadlow5anhlaj5avdkzbwzbmrxwkygxdp7ffieqd.onion/blog/noticer-noticing-ipv6.html
Hacker Man accesses your router to do 'bad stuff' it will have his own IPv6 address which would hopefully aid you legally, somehow [probably not, gotta keep that conviction ratio up!]. Thinking more about it, if Mr. Hacker Man connects to a lot of random routers... they all have to get their IPv6 address from the ISP so the ISP could determine stuff about the device if they wanted to, maybe, I don't know, I do not know anything about assigning IP addresses*).