[youarentrightjr]

> The primary purpose is not usually a list of known defects and many ‘bugs’ are not actually bugs but feature requests

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.

[grey-area]

The people who filed them would disagree and many would vehemently argue that their bug is in fact a bug, and is the most important bug and how dare you close it.