there's kind of a huge difference between sitting in an idle server in-game and using a third party client to access valve servers and do the same thing. Valve felt violated by this, as anyone would really.. but you can't ban idle maps, simply because the website is called tf2 MAPS. M A P S. you yourself said the word MAPS. so who cares? all mappers have to start somewhere, why not an idle map?
srry for the late reaction, but as I said Idle maps are made to exploit the game system. And should there fore be banned.