Omitting ?> at the end of Drupal modules :-o

Strange. Somewhere around the 1/4th of the coding standards of Drupal you can find a note on why the final ?> should be omitted from all code files (modules, includes, etc.). However I just checked all the user contributed modules on my site and 90% of them did not follow this. But every core Drupal module did! It seems only a handful of developers make the effort to comply with the coding standards ... otherwise they would have read them. :->