It's difficult to say what Anonymous stands for, because it's not a single organisation or group. Anyone can take the label of Anonymous when advocating a cause, and "become part of it".
Before Anonymous got "good guy" publicity for supporting Wikileaks, people calling themselves anonymous were mostly known for trolling: finding emotionally sensitive people and communities, and harassing them both online and offline for their own amusement.
The userbase has always been about schadenfreudic justice and retribution from a perceived slight of the day. moot - or rather, his attorney - fits the bill to a t.
The first things that came to my mind was they would likely try to destroy the brand by buying every moot.* domain and associating it with unsavory things, flooding sites that use moot.it with horrendous crap, and DDoS attacks.
Before Anonymous got "good guy" publicity for supporting Wikileaks, people calling themselves anonymous were mostly known for trolling: finding emotionally sensitive people and communities, and harassing them both online and offline for their own amusement.