Hi there,
I think it'd be useful (probably not too difficult) to ad an option on admin/settings/user_list to actually show the opposite list. I mean a list of users that have NOT posted a content of certain type.
This would be useful to clean the site from spammers users that were created only with the purpose of spamming comments.
On my experience I've found that many users are created with the aim to spam but afterwards are never used after all (don't ask me why). Therefore installations always end up with useless users.
Do you know what I mean?
Thanks