The May Awake is online and has articles on Is God Cruel? One of the articles talks about divine judgements and discusses the Canaanites.
See here... http://www.jw.org/en/publications/magazines/wp20130501/divine-judgments-were-they-cruel/
At the end of article it says the following:
HOW YOU ARE INVOLVED: We can learn a vital lesson from the judgment of the Canaanites. We are rapidly approaching the foretold “day of judgment and of destruction of the ungodly men.” (2 Peter 3:7) If we love Jehovah, we will benefit when he eliminates human suffering by ridding the earth of those who reject his just rule.
Jehovah lovingly reminds us that the choices parents make affect their children. God’s Word says: “You must choose life in order that you may keep alive, you and your offspring, by loving Jehovah your God, by listening to his voice and by sticking to him.” (Deuteronomy 30:19, 20) Are those the words of a cruel God or the words of a God who loves people and wants them to make the right choice?
Is the implication here that if a parent was to not be approved by God come Armageddon then their children will also be destroyed? Are the society just referring to a principle in general that parental behaviour affects their kids or is this a veiled threat regarding Armageddon?