> Suddenly, your smart lightbulb is accessible by everyone.

A firewall solves that issue, IPv4 or IPv6.

A lot of people, even on HN, mistake "addressable" for "accessible".

	▲	XorNot 2 days ago \| parent [-]
		It's because router defaults have been bad for a long time and NAT accidentally made them better. I finally have IPv6 at home but I am being very cautious about enabling it because I don't really know what the implications are, and I do not trust the defaults.