I suspect a number of folks here will appreciate this article in Ars Technica, about the folks who invest major time and effort in screwing up the Nigerian scammers who try to fleece the innocent. There are a number of clever ideas in here, including this gem:
Some of the more menial tasks involve posing as experienced scammers trying to befriend newbies in order to give them sage advice. "For example, scammers like idioms, but many of their native idioms are different to those of English language and they may not know that many from the latter. Teach them a new one: tell them that 'take this offer of mine with a huge grain of salt' means 'this is the chance of your life time and I am very serious about this,'" -C- says.