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by throw0101a 1754 days ago
> […] and it had got a public ipv6 (besides the ULA address and the link-local address) and it was happily listening on the public internet for something to print.

Another thought: perhaps 'appliances' should (by default? togglable?) have only ULA and link-local addresses? Basically anything that starts with "f" (fe80::/10, fc00::/7, multicast)?