I agree, but it seems to me that what you're talking about here are the different ways in which different technologies influence the word in interesting ways. My point is that composition curriculum, like any other curriculum, requires a sense of boundaries, requires educators to exclude much more than to include. By all means, motivation is important, but when it is the only concern the result is pandering. That's why I'm questioning the appropriateness of technology use. It is all too easy to put technology in the driver's seat, instead of beginning by asking what are our educational goals, and what is the best way to achieve them.
Rhetoric is a big tent.
And I agree with you in a sense that there are some places where some technologies seem more appropriate than others. Increasingly, students come into college classrooms with these sorts of basics under their belts. Discipline is not a dirty word. I get great reassurance that the car I drive, the road I drive on, the traffic signals I obey, etc., are all based on rules and boundaries. As Ted pointed out, we're talking about fy comp, not brain surgery.