The alerts at the top of the Wikipedia entry on Netnography say it all:
As experts and advocates for netnography, we are best equipped to fix all those shortcomings and make the netnography entry much more accurate, comprehensive, useful and informative for Wikipedia users. I’d like to encourage you to read the entry and improve it any way you can.
Frankly, this is a great example of how Wikipedia, with its openly editable model and collaborative approach to content development, is supposed to work. So please, have at it.