Hi Tyler,
The fact that they keep trying these scams means they must get the odd fish otherwise they wouldn't keep it up. I guess abusing these grubs is just water off their backs. Best thing we did was getting rid of our landline because that was what 90% of our calls were for the last 12 months or so even though we were on the do not call register. When I rang Telstra and told them I wanted it cancelled the operator was concerned that we would loose the number and my reply was that was the best thing that could happen, stop all the nuisance calls