They set up a caching server for their organization so the DNS lookups are faster, but they forget to restrict the recursive queries only to their organization

They set up a caching server for their organization so the DNS lookups are faster, but they forget to restrict the recursive queries only to their organization so anyone else can use them. That makes them work like Smurf ampliefiers (http://en.wikipedia.org/wiki/Smurf_attack http://en.wikipedia.org/wiki/Smurf_attack) in the past.