EDIT:
To make it more easy to understand the issue some might have.
There is 2 kind of dcs.
An alt+f4 disconnecting makes you still be in the game appearing online for a moment until you turns gray and your character dissapear.
A connection failure or pulling the plug is same as above you still hang around on the server.
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DC (aka booted from server) turns your charportrait grey directly, AND your character dissapear ingame.
Or you can do a macro-dc like its listed here, where you also get booted directly.
You strive to get the last 2 kind of dcs, where the first one is rather hard, it is usually issues with the game or such where the macro-dc does it on your command.
Just did this myself. think I DCed to early. :/ will give it a try tomorrow.