The person who smoked weed was agreeing with you.
I don't think we ever gave a curfew, as such, but we always expected them to be home for tea unless Something Was Happening. Usually we'd do an activity afterwards (except on Fridays, which was our family TV night) so no time for hanging out.
S1's about to take up a job as a teacher, S2 is looking for paralegal posts. They both appear to have reasonably decent social lives (partly based around hobbies, though not entirely).
My teenage years similarly had less hanging out than many of my peers, which I occasionally regretted but not massively. There was plenty of down time on orchestra courses, and I'm suspected ND so things would have been slightly different anyway.
Thinking about it, I used to walk home from choir practice (7 minutes) at just after 8pm at that age. While my younger sister was still at primary school my mum walked up to meet us.
My instinctive response is that 7:30 seems reasonable. During the winter months I'd be expecting them to be somewhere inside after dark (friend's house or McD's rather than the field) but while it's light I'm more of a "don't jump in the river and don't take sweeties from strangers" parent. In fact I occasionally said that, when they meandered into town on a Saturday afternoon
Yes, they rolled their eyes at me.
On the other hand, I once texted S2 to ask him to check in to Life360 because it had got stuck
. He humoured me.