At the moment a user with permissions to edit/add a HS enabled content type with "Allow creation of new terms" on, can create any number of terms, and then just leave without submitting any content.

This can lead to spam/duplicate/unwanted terms pollution (see also http://drupal.org/node/1389740, http://drupal.org/node/1414934).

Unless the dropbox is enabled (user might need to select/add more than one term), wouldn't be better to add the term to the vocabulary ONLY on node submission? This would ensure that the term added is actually used to tag at least the node that is being submitted, and allows administrators to check which terms are being added to the taxonomy too.

Thanks