My Y9 son stormed out today because I followed through on a threat to confiscate his tech whilst he was at school following some pretty unacceptable behaviour. He came home from school, realised I had hidden his keyboard and chargers and stormed out. He came back but then swore at me quite a bit and he said he was going so in the heat of the moment I said go if you are going to behave like that. He took it quite literally and was still missing at 10.30pm. I was pretty frantic. He doesn't go out at night. He leads a safe, middle class life, and we generally tick along nicely with the usual grumpiness and the odd fall out. His phone was out of battery when he left so I didn’t attempt to contact him at first. I was busy cooking dinner and expected him to come back as he has done this once before. It got later and later and I texted him saying “please come back xx” and he responded around 10.30pm saying that he wasn’t coming back. I tried to persuade him and said I would get him an Uber (I don't drive) and asked him to tell me where he was and he just said that he was safe and that it was too late to come home. I had no idea where he was and all sorts of things were going through my mind. He eventually told me at about 11pm that he was at a school friend’s house, that everyone had gone to bed and that it was too late for him to come back. He is now spending the night with a family I have never met but who I believe live about 25 minutes’ walk away. I don’t have the parents’ numbers but there is a WhatsApp group where they could have asked whether I was on the group and let me know he was safe. I asked him to video call me so I could see where he was. I have to take his word for it that he is where he says he is and he is now sleeping there against my will. He won’t have his books or PE kit for tomorrow. AIBU for thinking that the parents should have made an effort to contact me because I was beside myself with worry and really did not want him to sleep over?