MeredithHale, the administrator for the GoodPortsmanship contest, was given the title The Eradicator because she anonymised the entries to that contest (eradicating designers' names and other identifying information before it went to the judge of the contest).
If anyone is curious about where the name originated, it came from the very first episode of the Canadian comedy show, The Kids in the Hall. The full text of the sketch is online. (I don't think the script tells you, but The Eradicator wears a ski mask throughout.)
-- RonHale-Evans 2007-01-10