Whilst reading through issue 16 I couldn't help but think that Joker's actions towards Dick were actually somewhat flawed in their logic and reasoning. It's been made pretty damn clear that Joker desires to wipe out the Bat-family from the face of the earth as he believes that their presence causes Batman to be weak as it gives him something to rely on and fall back on. However with his actions towards Dick I couldn't help but think that Joker will actually be making Dick stronger in the long run (assuming they have a lasting effect), he calls Dick the '"worst of the Bat-fakes" and the one who makes Batman the weakest (possibly as he is Batman's strongest ally in the family), and then he proceeds to try and destroy Dick's trust in people which is the main thing that separates him from Bruce.
See what I'm getting at? On the one hand Joker berates Dick for making Batman weaker but then his actions could potentially serve to make Dick more like Bruce and therefore an even bigger 'Bat-fake'. If Joker destroys Dick's ability to trust people it'll have a knock-on effect on everything else, he'll likely hone his skills to levels equal to Bruce as a result of losing his trust in people as (like Bruce) he'll believe he can only rely on himself and must therefore be as strong as he possibly can be.