Nervous for the future

Virginia
So I'm here on lunch break watching a little boy(at least 8 years old) defy his mother. He is cussing and yelling at her, raising his hand. I know it is all how you raise your child. Trust me I've got the discipline plan in check with my boyfriend and family because I refuse to put up with it. However it's the world that scares me into changing my son into a terrible person. I hope I'm not the only one. Any advice for a worried first time mommy?