You're not VAC banned, all they did was take away what you got from the idler and not give you a halo.

They will be adding items back that you've "earned" with achievements today. In addition, they seem to have made their own .. idler .. or something. People are apparently getting items when they're not playing.

It's really not that big a deal. The only thing that concerns me is the 'sanctity', for the lack of a better word, of a game after its purchased from valve ... if they can always change it based on what ever they want .. who knows what will happen in the future.