Why would anyone support this behavior...
Game aside, I don't understand why there are a select number of people supporting this game. The bottom line is that the developers treat their customers like trash, they lie, and do whatever they can to take your money then ban you if you critique it.
Even if the game was playable and not in a technical alpha state, why the hell would anyone want to give money to a company that treats people like their stupid? I'm glad with the way Valve acted by removing the buy option and saying it was a mistake to have this game up on Steam. In this scenario the bad outweighs the good and the communities words were heard.
If players continue to support actions like the developers of The War Z then I fear for the future of gaming.