Thank you I believe this was the right move Although it often seems like the majority of IP editors engage in nothing but vandalism and that they would be unlikely to contribute positively to an article studies in 2004 and 2007 have demonstrated this to be a myth See Perennial proposals Prohibit anonymous users from editing for specific details of the studies and for references You may be right that they won t help to reference the article from the above refs but at least this way we re giving them the chance to improve the article a chance that Wikipedia deserves