@rakoo @cehteh @lyyn the emacs-spacebar XKCD is great but maybe not entirely fitting here. We understand the concern of "the other side can remove a message on my device, and i don't like that" but it also needs to be squared with other concerns like "Damn, i sent this password/secret/photo and i really didn't want to do that, need to remove it quick". What matters a lot is that Delta Chat is designed for chatting among friends or at least non-enemies. And to test out things in real-worlds.