I really believe that editors should have some idea of the subject matter that they're editing and not just what they've gathered from a few google searches. That said, I see nothing wrong with editing articles to remove vandalism, correct spelling errors or carry out any other maintenance task that doesn't require reasonable knowledge of the subject.
I believe that information should be free and that copyrighting images when anyone else could take the same photo is just wrong. Accordingly, almost without exception any images I upload to Wikipedia or Wikimedia Commons will be released into the public domain.
