Responded to an idle issue auto-close ping like this https://github.com/ssbc/patchwork/issues/464#issuecomment-435603319
Will probably become my boilerplate response, so any improvements welcome and please consider using it too.
I hate these things, because they're used to make a project look better than it is. I make a point of going through old issues, and verifying they are still there (manually) and checking that I haven't missed any duplicates etc.
I feel like that's more work, but it's also quite obvious to me that it improves the project.
The one case where I do "idle ping"s is when something hasn't been confirmed yet. I feel like that's a compromise to weed out weird flukes.