Auto-logout has been introduced today, but there seems to be a couple ways around it. It's supposed to log you out after 30 minutes of inactivity, but if you just yank out your fishing rod, use it once in any body of water and leave your char standing there with rod in hand - when it's your turn to go instead you'll just get a "Unable to execute command while gathering" error.
It should probably work the same while crafting, haven't tried it yet. Dunno if anyone has any use of it, I guess in the worst case scenario you can use this trick just to avoid login queue when you get back to your game.