Someone who leads on a internet scammer in order to waste their time and resources.

A person who responds to fraudulent emails in an attempt to waste a scammers time.

Someone who misrepresents themself to a e-mail scammer. The desired result is either to impair the scammer's ability to work on other scams, or to wholesale counter-scam them.

A person on the internet who attempts to 'scam scammers,' by replying to scam emails claiming to fall for the scam, but use various methods to avoid sending money. A scambaiter will often attempt to extract photographs from a scammer, of them holding up a sign, but it is believed innocent people off the street are sometimes forced by the scammer to pose for the photographs, so photograhs are discouraged in many circles. Another discouraged practice in scambaiting is the illegal act of getting money from the scammer trying to get money from you, which is nothing more than hypocritical.