Prompt and tick to ensure posting to old thread?


Well-known member
Searched RM, but didn't get a hit for an add-on with the following functionality - has anyone seen such an add-on?

Scenario: Thread is 'old' and hasn't been posted to in xx (admin defined) months (eg. 6 months). When a user submits a posts to this thread, they get an overlay/popup informing that the thread is old and are they sure they want to post to it?