Anyone with an account can log in, click on a user's name and view ideas that that particular user has promoted/demoted. This decreases the level of anonymity that some might prefer, and may cause conflicts if one user sees that another has demoted his/her idea.
Currently only the Idea Rational Description can be edited before an idea receives approval. I submitted an idea on a site's IdeaTorrent and later regretted the title that I chose.
