They pose as CHRC moles, slag off gays, greeks, women...you name it.
Here's more on the story of Marc Lemire (the guy suspected of being behind The Fairness Fairy) sockpuppeting his own wiki entry, mentioned at the ARC post above.
PS. They slag off jews too. Got a screen cap of that one.
And it looks like, whoever the Fairness Fairy is, he's been posting to StormFront frequently and recently. (Don't worry, link goes to google-search result).