Maybe the term 'standard' was not the best choice here. Anyways, I am not proposing that there should be a new rule by the forum when it comes to the titles for signature campaigns. More like a gentleman's agreement between the bounty managers to make it as clear as possible what kind of individuals they are looking for.
How would that work? There is already a stickied thread somewhere here
https://bitcointalk.org/index.php?topic=615953.0 that has all the campaigns organized and sorted between open and closed. True it doesn't state which slots are open, but I think this is the best we have at the present, since someone else opening a new thread just to list open spots will fall off the front page quickly.