Currently plugin developers can mark support threads in their forum either 'resolved' 'unresolved' or 'not a support question'. As a plugin developer active on the support forum for my plugin, I would really like to have a 'close discussion' option.
As anyone who volunteers on the support forum knows, the same queries come up again and again. What I do is write a quick note 'please see existing thread > [link to other thread]' but in a case like this the issue may or may not be resolved. So this would be the perfect place to use a 'close discussion' option to prevent discussion spawning across duplicate threads.
It's also a common problem that users post a new issue in an existing thread. Being able to close threads would assist in managing this issue too.
I can see that the privilege to close thread is possible to abuse... so maybe only activate for plugin developers that have shown themselves to be active on the forum - such as have it activate after x posts?