I am sure they used to have an AFK timer in 1.0 and after 20 mins of inactivity you got disconnected. You could however just go into the menu and turn it off though so it wasn't forced. I think the AFK timer is a good thing as people who are AFK are taking up spots that people who are ready to play need and I personally think it is rather selfish of people to do it. Yes I understand that you have problems logging in but keeping yourself logged in just means you are creating a bigger problem for others. If everyone actually logged out instead of going AFK I'm sure these problems wouldn't be half as bad as they have been.