ho to filter hundeds of domains ?

[fddi]

Hello,
I need to implement a bind filter for many hundreds of domains which are 
considered outlaw and illegal
by italian government about gamble games.

If I create a named zone for each illegal domain and configure my 
nameserver as authoritative
for those zones, I can catch the DNS resolutions and I can resolve with 
a local LAN IP with a message for users.
But it is really complicate to manage such a high number of domains.

Is there another way I could achieve this ?

thank you

Rick