Why not add an AAAA record for for pingbox1

I have set up an IPv6 Tunnel and am graphing the quality of the connection. I noticed that you encourage people to use pingbox1.thinkbroadband.com in the firewall if they want to only allow ICMP packets through from a specific v4 address.

I was wondering if this could not be extended to add an AAAA record for people graphing their v6 connection in the same way?

Note I have already added the v6 address manually into my firewall and all is working well, this is just a suggestion.