DS1 announced he was going to an overnight small party tonight and I said fine as long as there is an adult present in the house - that I would check on drop off. It turns out no there isn't an adult there. I am met with a deluge of 'what exactly do you think will happen' and 'I could get married and leave home' arguments. He is generally pretty sensible but some of the others do take drugs and I have my doubts as to why any family would leave a 16 year old overnight and condone an overnight party with a few lads (that's the story anyway!) I've said it's nearby and I have no problem him going and coming back by 12 as it's nearby, but not overnight. His argument is 'what's the difference between that and overnight'. I can see the argument and don't really have a great answer apart from 'I'm uncomfortable with that as a principle' but feel uncomfortable about this one. Any thoughts?