Agaric wants to disable comments for nodes, en masse, retroactively
Key words and phrases
disable comments on multiple nodes bulk disable comments drupal retroactively disable comments drupalTags
Description
disable comments for all nodes of a content type (meaning existing nodes)
This guy wanted it for Drupal 4.6...
http://drupal.org/node/161880
These folks only wanted it for specific nodes, which of course is built in:
http://drupal.org/node/87495
Long story short, there does not seem to be much demand for the ability to retroactively disable comments for a large number of nodes.
I'm sure there's some people who wanted and probably created the ability to turn off comments automatically after a certain time? That's a common feature on forum software and a common feature request, that I tend to disagree with -- just use good captcha, and a way to direct people to related content that is newer, instead of taking away the ability to revive a year-old conversation if that's the bes thing to do -- so maybe I have to do some searching.
It should be easy enough to implement in Drupal 5, if anyone has any interest in funding it...
Slightly related:
http://www.whatwoulddrupaldo.org/a-modest-proposal-node-attributes

Disable - drupal disable comments for a bunch of nodes at once
It should be done through the admin node listing functionality.