Awww, so you won't change it then? According to the descrption of Taunt, the "target will attack the source of Taunt", and a heal is not an attack. Also, Favonious heals all allies, and a taunt should not change the definition of ally.
Heh, it’s been like this since day one. Previously, only the poor low-level skeleton had Taunt, so very few people actually noticed it. :^) But the description of the effect will be updated in the next build.