The dark side of VOIP

With all the hype at the moment about VOIP and the fact that we can ring anywhere for 1 -2 cents per minute it has occured to me that there is a downside to this wonderful technology.

If its cheap for us to ring America, Aisa etc ergo its cheap for them to ring us. Why is this such a bad thing you may ask? Well the don't get me wrong as Bob Hoskins stated for the BT ad "Its good to talk". However its the credit card scam/holiday scam mechants that I'm worried about. Suddenly there market place has expanded. Recently we recieved some phone calls at home in the evening from the States which has caused me to raise the state of alert for the Noonan household to Defconn 2.