An often asked question regarding Wiki's is:

"So if anyone can update the content what stops people putting up misleading comments or incorrect information on a topic?".

It is a really good question that I also thought about. Today I noticed a great example of what prevents this kind of abuse happening. On wikipedia.org there is a topic about Lotus Notes. It has heaps of info on the history, use, and future of the product. It was noted however that some people had been rather negative and opinionated on the entry rather than objectively explaining the products (good and bad of it). While this did happen the interesting result was that before long many other people had read the entry and it was very quickly corrected with more factual and accurate information.

So the answer to the question is in fact the real power of the Wiki concept. A Wiki allows people to correct others errors. Off course there may be some disputes but these seem to work themselves out pretty quickly when people start being objective rather than expressing personal opinion.