Currently, you can ignore specific characters in the WoW forums. Unfortunately, an individual battle.net account can have (30? Forgot the upper limit for WoW) many many characters driven by the same person.
Generally speaking, a character-specific ignore is not effective when a user can simply ‘Change Character’ and continue.
Please provide an account-wide ignore feature for the forum, or if one already exists please enlighten me how to enable/use it.
Thanks!