Typically amateur attackers known as "script kiddies" who gather victim computers (referred to as "roots") that can be used to host a phishing site or a spam relay. In some cases, exploiters will break into credit card databases directly to harvest credit card data, skipping the phishing stage entirely.

A person who exploits an unfair advantage, typically in an online game.

See Fender

The guild: Karate Apocalypse.