There's nothing wrong with the OP admitting it. I need to shut down my computer on a nightly basis or I'd do it.

Everyone is doing it because everyone is doing it. Sitting at a login screen for an hour, two, four, is absurd.

Auto-kick after an hour would fix a lot of this by constantly kicking people who afk'd. It won't fix the population issues, but there aren't actually this many people at once, just so many afk.