First, Proverbs 22:6. "Train up a child in the way he should go and when he is old he will not depart from it." If when you look around this world you see a lot of people who are not going the way they should be going, then you can almost be certain that no one trained them as children. Then you should not make that same mistake. TRAIN your children. Every day. Intentionally.
Second, when considering grown ups who make decisions contrary to decisions you would make it's important to remember that they are grown ups. And grown ups have the right to make their own decisions. And most likely that doesn't affect your life as much as your lack of self-discipline and faith. Example: Christians who want to point out how everyone else is not living right but who have yet to ascend to heaven as a result of having achieved perfection themselves. (Talking to myself, too, here.) I say, live and let live. But REALLY live! Empty yourself of self and be filled then pour out the Spirit of true love. Others will have to deal with the consequences of their actions should they choose to reject the love you offer them through Christ but don't get hung up trying to micromanage people's lives.
I guess what I'm saying is be real. Live fully. And leave a legacy worth sharing.