intertwingly

One issue with offering per entry comment feeds is that there are an array of bots and aggregators that will continue to poll such feeds literally forever.

I’ve decided to only offer per comment feeds for a period of 90 days after the last comment has been received on any given entry.  After which point, the autodiscovery link and the common feed icon will be removed from the page for that entry, and any attempt to fetch the feed will return an HTTP 410 Gone status code.

With a properly configured client, subscription to comments for a particular entry should be a matter of two clicks, and unsubscribing should be automatic.