"Differences in expression or expansion or analysis of ideas are judged ipso facto as doctrinally deviant. In an artificially controlled atmosphere, theology dies."
The above quote by a theologian, who was addressing a different matter, appears to apply also quite well to the discussion of theology on e-mail lists and blogs.
Online discussion is quite interesting. For example, in discussing the liturgy one may be considered an anti-nomian and a legalist - at the same time. Hmmm.
On the other hand, when online discussion leads to confusion, or just confusion, there are always books. Books force you to listen, without talking back to you. Maybe theology still has a chance . . .