Anyone would point out that the most common criticisms of Wikipedia also apply to print. A print publication… once published, it’s difficult to correct or improve, but it’s also hard to fuck it up.
If you’re using Wikipedia as a cite, the least you can do to protect yourself is link to the specific version. You can do that by looking through the history; specific versions aren’t edited. Either they exist or they don’t.
I think Wiki is the greatest thing since sliced bread. There are two things to help avoid being snookered by errors, though:
Never trust a page that seems like it was writen by a 5th grader. Good writing isn’t an indication of accuracy, but poor writing is often a sign of sloppiness with facts.
Follow the links at the end of the article. Sometimes just looking at the source of the external links tells you a lot. For instance, if it links to credible sources, that’s a good sign. If it links to somebody’s blog, beware! I once tracked down a page that someone used to answer a GQ thread, and it looked very fishy. I checked the links at the end and found that every one of them (there were about 4) could be traced back to only one obvioulsy phony article on a very shady looking web site.
If you read it with a questioning eye, you can learn a lot. After awhile, it gets easier and easier to spot the errors. By and large, though, it’s a tremendous resource.
Of course that’s good advice for any article of this sort. Sure, some places are less biased than others, but many still have a distinct slant at best or an agenda to push at worst.
The strength of Wikipedia is also it’s weakness. Anyone can ruin a page, but then anyone can fix it. It does mean that you never quite know what you’ll get on a given day, but it’s part of the charm of the site.
But used properly it’s a great resource, and it does teach you not to blindly accept what you read, it just provides a starting point.
In my experience, Wikipedia is a great journey but a lousy destination. When I want to find out about something quickly, I Wiki it. Then I follow the links at the bottom of the page and look up any book or article sources it cites (if possible). Finally, if motivated enough, I might try to track down stuff written by someone it cites as an authority. But I’d never use an info. straight from Wikipedia in a dissertation or similar.