In our hype about things digital, especially Web 2.0, we sometimes forget that we, essentially, talk about a set of tools that could be used one way or another. For good or for bad. And that is ultimately upon us to make that difference, not the inherent 'morality' of Web 2.0.
This is the point recently made by the technology/business writer Nicholas Carr in his blog Rough Type. It's well worth reading.