Not only that. It also shows that a project needs to invite help.
A helper who wants to do something like like this does not necessarily need to code a lot (even though it is of course necessary to have basic programming knowledge to triage bugs). But he needs extensive rights in the issue tracker, so that he can tag and close and comment with authority, and the other developers need to respect that work. Something like that won't appear out of thin air, something like that needs a process, the possibility to build up trust, and an invitation.
This is something important that I forgot: GitHub's permissions are such that you need to have commit to truly do this job effectively. For Rails, this means that the issue team has commit on GitHub, but isn't actually allowed to commit. It hasn't been a significant problem.
