In reply to Chopper:
> would I be right in assuming that behind each scam call is a big organised crime set up, maybe the Mafia? Or even a terrorist group?
Definitely organised crime, and normally done from overseas. The resources needed are massive - they have to set up dodgy bank accounts, they have to set up dodgy telephony connectivity, they have to set up dodgy call centres. The victim rate is so low nowadays they need to make literally thousands of calls and be able to cover their tracks to make any money at it.
Post edited at 11:02