Auditing

Auditing is a module that adds a permission to Drupal. Roles with that permission are no longer able to submit forms and therefore are only able to see content. You can administer which form ids are still usable by users with the given permission (like login or search forms). Together with the built-in permissions it is so possible to create an audit role that can be given to internel or external auditing department or just to the head of a marketing to department ot be able to see what is going on on the site.