How easy or difficult was it to find articles that needed editing? Were the errors you found factual or grammar / spelling?

I use Wikipedia quite often, usually to look up small things such as a name or song title. I have often had discussions with my fellow English majors about the benefits of using Wikipedia as a jumping off point when doing research. However, I have found that many articles are poorly written. As I was looking around today with the intention of finding and correcting errors, I found that the vast majority of errors were related to comma misuse. This seems to be a common mistake I find in many people's writing since commas can be tricky little buggers. Overall, I like Wikipedia because it's quick, easy-to-use, and usually correct enough for my purposes.