They didn't put in a logout timer on purpose, you know, the whole 'give the player more freedom thingie'.
You realize that even with a "logout timer" one can still kill the process and logout immediately right?
No game can prevent windows from killing a process.
At best they can put a delay before the server considers a character as logged out, so the char itself is still logged in for a few seconds.
It will be fixed but it's not a major issue for me honestly. If you do it in sPvP you're kicked out of the game anyways.