What you'll need:
White collared shirt
Are you into social anarchy? What about the internal online destruction of capitalist companies and media conglomerates? Even if you have the computer skills of a 6-year-old, you can easily dress like a dapper hacker this Halloween. A simple suit plus the legendary Guy Fawkes mask from Alan Moore's graphic novel V for Vendetta will be useful in concealing your identity and causing partygoers to hide their mobile phones, just in case you're part of the real-deal hacking collective. After all, no one wants their Twitter feed compromised with pictures of their party-time indiscretions.