Yes, I’m sure those iot devices will use infallible privacy extensions... Nah, they’ll probably expose their mac, which will make it trivial to scan for them.

Truth is, right now iot devices are protected by nat (your router) and maybe cgnat too (if your isp is good enough and provides that service). With ipv6 those devices will lie exposed to the wan. I hardly see how that’s an improvement.

Also don’t trust regular devices. Windows disabled privacy extensions because of a bug (not sure if it’s fixed already). https://social.technet.microsoft.com/Forums/windows/en-US/57... — I trust my router’s nat much more: it can’t be disabled because of a bug ;-)