I’d offer the hypothesis that any sufficiently advanced read/write technology will get used for two purposes: pornography and activism. Porn is a weak test for the success of participatory media - it’s like tapping a mike and asking, “Is it on?” If you’re not getting porn in your system, it doesn’t work. Activism is a stronger test - if activists are using your tools, it’s a pretty good indication that your tools are useful and usable.