There is no "good parenting" fix that will keep children from trying to access inappropriate content, forums where unhealthy conversation takes place, pornography, and worse. Being a good parent does not and cannot remove the curiosity, temptation, and ability to access bad content. This is a problem with the human condition, not bad parenting.

As a parent myself (and, I hope, a good one), I have found it very difficult to effectively monitor and limit my children's ability to access these things. And I have more facility with technology than the average parent. It's a complex and frustrating problem and the stakes are high.