99.99% of people won't have an IPv6 connection and can't be bothered to set up a tunnel. However it's still possible to play with IPv6 on your home network, and relatively simple too if you have at least one Linux box:
The point of the day is to ensure that enabling AAAAs on the server side does not break the world. clientside IPv6 connectivity is a nice plus, but optional.
A couple of corrections:
1) ULAs are normally not routable over the internet. Though of course blocking them explicitly would not hurt.
2) depending on the RFC3484 configuration on the hosts, this "IPv6" might break connectivity to dualstack sites.
Please - go to tunnelbroker.net (or sixxs.net) and get yourself a tunnel - it is not that difficult, really.
https://rwmj.wordpress.com/2011/06/02/ipv6-lan/ (Make sure you read the comments for clarifications and fixes)