Logout: GET or POST?

This question is not about when to use GET or POST in general; it is about which is the recommended one for handling logging out of a web application. I have found plenty of information on the differences between GET and POST in the general sense, but I did not find a definite answer for this particular scenario. As a pragmatist, I'm inclined to use GET, because implementing it is way simpler than

[peketamin]

マジですか。でも考えてみればなるほど…

[side_tana]

え，うそん "today (in 2013), browsers will pre-fetch pages they "think" you will visit next."

[yife]

"ログイン処理はGET/POSTのどちらで行うべきか？" そもそもRESTはログイン/ログアウトなどの処理に向いていない、など