An additional thought - what is the definition of "commercial link" per se?  3/4ths of the pages I visit on Wikipedia have an "external links" section.  The Doctor Who page links to dozens upon dozens of websites.  Some of these are professional, some of them are amateur.  Some of them retail Doctor Who merchandise for profit, some of them do to cover expenses.  In what way is the term "commercial link" therefore even relevant?  It seems to me the only way to remove "commercial links" would be to take every "external links" section off every page on Wikipedia.  That would be rather foolish though, as external links are relevant to the reader both for providing additional content and additional information beyond the scope of a Wikipedia entry.  It seems to me the only gauge for removing a link should be if it was completely irrelevant - for example if one was to add a link to the page for bicycles about plasma screen televisions.  If you are adding an external link to a page that is directly related to the subject matter of the page and not abusively modifying any other section of the page as some are prone to do, I fail to see what calls for a warning at all.  I would argue you need to set a fair standard - if you are going to call into question the external links that I add to Wikipedia then you should remove any others that offer the same content, often in a less professional and truly "commercial" manner unlike the free sites I link, sites with directly relevant information.  October 27, 2005.