Why option "Filter IPv6 traffic" disabled by default?

Why option “Filter IPv6 traffic” disabled by default? Does it mean that all IPv6 traffic will go bypassing firewall?
This is really danger because IPv6 is enabled by default for new connections in Windows.

I’ve wondered the same thing. I turned it on - and also unchecked IPv6 for my network adapters when I first setup my PC. I figure I’ll re-enable IPv6 when I miss it.

I think this option must be turned on by default.
So, if somebody enabled IPv6 protocol for some Network Connections don’t forget to turn on this option.