Well, should we? I have read several articles at Wikipedia. Sometimes they are ok. Most of the time, they are left of center. I tend to treat the information from there as I would information from NBC, CNN, etc…. Basically, in my mind, it is all about knowing your source and knowing how much credibility they ought to have. In my world, Fox News has way more credibility than CNN. Depending on the slant of the Wikipedia article, I may give it some, none, or a lot of credibility.
Here is a link to a site talking about the problems with Wikipedia.
For those of you who don't know, Wikipedia is a wiki. What is a wiki? Well, this being an area where there is little subjectivity, here is a link to the wikipedia article on wikis. In short, a wiki is a webpage anyone can edit and add to.