AAAA/A6 lookups

[Chimento, Douglas]

All,
	I was going through query logs and I notice a couple things that
maybe one could help. 
ns1.fidelity.com is one of two name servers.
I see 45,000 requests in a 24 hour period. Of those 45,000 requests only 500
are A records the rest our AAAA or A6.
So my questions are 
1) Why so many ipv6 requests?
2) Is there any way to black whole these requests? Like maybe creating 
	false A6 records with a high TTL ?
3) Does bind , by default , make A6 queries before ipv4 requests?