If there is a taboo, I break it all the time. :-)
I think Wikipedia is an amazing experiment. It's got flaws, obviously, but overall I consider it one of the most exciting developments in global knowledge-sharing that's ever taken place. Up there with Gutenberg, surely. I have an Android phone, which now understands spoken questions, and often answers them from Wikipedia. It's completely amazing to have an encyclopedia in one's pocket. And the whole model of globalized collaborative writing is extraordinary, and new.
I was at a lecture a couple of years ago when the speaker was criticizing something in one of the Wikpedia entries. I had a laptop, and before the lecture was even finished, I had updated the Wikipedia page to reflect the lecturer's corrections. This kind of thing raises all sorts of interesting new questions about the nature of academic knowlege storage and transmission, what we trust, and how we manage our relationshop to our sources. The history-tracking feature of Wikipedia is absolutely critical to its value.