Yes, my kids when they were on the internet. At the time I had two teenage girls and I felt it was my responsibility to protect them using whatever means available. There is software you can put on your computer which records all the activity. The kids were always aware of it and there was never a problem. However, my new husband didn't know about it and about 6 weeks after our wedding, I caught him going into chat rooms, viewing webcams, having cyber-sex with other women, and even planning to meet up with some of them. Ironically, the sexual activity was not the issue. It was all the lies and dishonesty that was the problem. I had what was known as an "open marriage" with my first husband so if that's what this one wanted, there could have been some arrangement. But that's not how it was. He kept going behind my back, telling lies about how horrible I was. He lied about our relationship and said we were just living together. He lied to gain sympathy and to manipulate lonely women he met in chat rooms. He made promises to me about never doing it again, which he never intended to keep. He claimed to have an internet porn addiction, etc. He went to therapy, we went to counselling, but he never quit the behavior. He was also an alcholic which I didn't know until after we were living together. I went through several detoxes with him, each one worse than the one before. He would stay sober for a few months, but then he would always go back to drinking. So, after five years, I finally had enough of the dishonesty and the insanity of this relationship and showed him the door.