See my reply to eminence32 - bug tracking serves as a list of known defects, not as a list of work the engineers are going to do this [day/month/year].
IME there are separate mechanisms to track feature work, bug trackers are for... bugs.
> or misunderstandings from users (e.g. RFC disallows the data you want my html parser to allow).
Again, this is a class of bug report that nobody is arguing should stay open.