Forward your scammer emails to Re:scam and here’s what happens.

Source: Re:scam

The AI bot assumes one of many identities with little mistakes and tries to keep the scammer busy with the email exchange for as long as possible using humor.

Which reminds me of http://www.jollyrogertelco.com/ (seems to be down now), which had a number and an AI which you could connect to and the AI would try to keep the telemarketer talking for as long as possible.