Often people post things that are only of short term interest.
"Next week [TV channel] is showing [program]"
"Anyone interested in dinner on Saturday?"
"Send me your address if you want a Christmas card"
"I've put [object] up for sale on eBay"
I would like to be able to *OPTIONALLY* specify an expiry date for any such posting. On the expiry date, the post would be automatically deleted, on the grounds that it's no longer of any relevance.
The default behavior would continue to be that posts didn't expire.
Obviously this could be done via a plugin.