Comment 27 for bug 176125

I guess it would make more sense to add an option to NetworkManager where you can enable or disable this flag. NetworkManager could enable it per default then.

If this was implemented I'd even go one step further:
* Set /proc/sys/net/ipv6/conf/all/accept_ra to 0 per default (if I setup a server somewhere I generally don't want to have autoconfig enabled unless I choose so).
* Let NetworkManager set /proc/sys/net/ipv6/conf/$iface/accept_ra to 1 per default (can be changed with an option).
* Let NetworkManager set /proc/sys/net/ipv6/conf/$iface/use_tempaddr to some default value to be discussed (can be changed as well).