[kbenson]

> I can guarantee you that they don't care if you are "on to them". They just stop calling because no one is picking up the line.

I think that depends on how big a fish you are to them, or at least your relative size in their food chain. If you have someone worth a few hundred to you every month, you'll probably put in some extra work if you can't get that money for a month or two to try to recover that source.

[crpatino]

There's the opportunity cost to the attacker as well.

Sure, they could walk around your barriers and scam your relative... or they could shrug it off, carry on with their list, and scam another five or ten people in the same time frame.