Bumping old content to the top of the news feed needs to stop.

Over the past few days I've noticed that you guys have been bumping a few old posts to the top of the feed, like the PS+/GWG free game articles. Today you've bumped old posts so often that I can't tell what is new and what is not.

We shouldn't see articles posted 17 minutes ago with comments that are 2 days old. Please stop bumping old posts to the top of the news feed, it's making a bad experience even worse.

Threads should lock automatically after a certain time

@MonsieurX: Talking about the news feed, not the forums.