Facebook blocked

Today I added two lines to my dnsmasq.conf to block all facebook related queries.

address="/facebook.com/192.168.1.1"
address="/fbcdn.com/192.168.1.1"

This is a result of various articles about its "functions" to track also users without facebook account.

What remains is to configure my http server to serve an empty page on any facebook request otherwise you'll have everywhere "Not Found" messages.

This could be solved by configuring name based virtual and set error page for 404 to empty one.