Hmm...mild mannered?...yeah but he does have a temper...as he told Kinsey, he doesn't suffer fools gladly...and he can be pretty passionate about what he believes is right...and I don't think you have to worry too much about reminding people about the few times when vengeful!Daniel has been seen...because the moments have been so unexpected that they are memorable...have you seen the two episodes I referred to?
I meant that I would never attempt the plotline you're playing with because I'd be afraid that I couldn't give it proper believable resolution.