Maybe have an on-line quiz requirement before the forum accounts can be used to create new posts....?

1.) Create account
2.) Study wiki/stickies/relevant posts
3.) Take www.dual-boxing.com quiz to activate account
4.) If pass, allow posting. If fail, require re-quizzing.

Sample questions include: "Create a macro to cast the spell Fireball at the current target of your character's focus", "List three ways one can send the same keypress to multiple clients", "State why it is important to be the real account owner of all multi-boxed accounts", etc...