That site is really depressing. When they make him woodcarvings and take pictures and read audiobooks for him, you realize those people are just completely desperate and trying to make ends meet any way they can.
There's a huge difference between saying "tormenting these scammers, vigilante-style is unsettling and perhaps distasteful" (the takeaway I got from the This American Life story) and saying "Nigerian scammers are good people".
They can be bad people, some of their number may have murdered people, but I don't think that makes any and all actions toward them justified.