We scam the Indian call centre scammers (techcentral.co.za)

How did he ascertain the nationality of the scammer to be Indian?

I find it hard to believe that Indian authorities would do nothing and let this scam continue.

The scary part is that some of these scams are sometimes so believable. I wonder how many gullible people were falling into the traps of these scammers. Is there a way by which we could do something to catch these scammers?