ISP fake result

[samsouk]

Hello,

my isp is returning a fake address for non-existant domain names

------------------------------------
host xsxsxsxsxsxsxsxsxsxsxs.com 194.117.200.10
Using domain server:
Name: 194.117.200.10
Address: 194.117.200.10#53
Aliases:

xsxsxsxs.com has address 82.97.10.68
------------------------------------

this dns (194.117.200.10) is always returning 82.97.10.68 wich is the 
address of a web-server. The isp says it is to help customers (!!!)

I have bind-9.2.2 on my local network, acting as a caching nameserver.
Is it possible to filter these results (replacing 82.97.10.68 with a 
'not-found' result) ?

I know I can block this on the firewall but I really need valid dns-lookup


Thanks for any help