I think it's really awful to give someone that young a hard drug like ecstasy, but when I watched this I felt so sad for the dad's situation.
I sometimes wish I could share ecstasy with my parents, and if I ever could I know it would be one of the most meaningful experiences I could share with them and would probably completely change my relationship with them. But my parents would never be open to it.
I know it seems really bad, letting his teenage kids take ecstasy. But was the outcome really that bad? You could tell they're a really loving family, and later in the documentary his own kids are telling him he shouldn't keep ecstasy on him after he was arrested, and the kids seem really concerned about their dad. You can tell the two younger kids aren't going to do anything stupid like start abusing ecstasy frequently.
Look at the daughter's boyfriend, he was snorting crushed pills at the party, and the younger son already smoked weed and got drunk. Maybe the dad knew it was bound to happen and just wanted to be present when it did.
I abused mdma a lot when I was a teenager and my parents would have been dead against it if they found out. Even though my parents HATE drugs I still would have done it anyways. His kids already seemed to be into the rave/drug culture just by the friends they had so they probably would have done it anyways. People really shouldn't judge them and call them thrashy because they seem like a really loving family. Maybe deep down inside the dad knew they already wanted to do it so telling them not to wouldn't have prevented it (they would just do it behind his back which would probably be more dangerous).
Did the dad try to force the kids to take ecstasy when they didn't want to, or did he just let it happen because he knew it was bound to happen sooner or later?