24 hours to report missing isn’t an actual law, it’s just garbage used on tv to create drama.

When I was in high school I didn’t have a curfew or anything, just had to let them know where I was. The key was making sure my mom knew, my dad was much more laid back, so if I talked to him I had to make sure he told my mom or that she was there when I told him. In this case it might just be getting into the habit of letting them know you won’t be home after work.

As a teenager you see it as them trying to control you, as an adult you realize that you want to know where they’re going to in case something happens to them. The mistake made in this situation was a complete lack of communication between your mom and grandparents. However, if your grandparents are your legal guardians (as opposed to your mother) you should’ve let them know where you were as opposed to your mom.

100% your grandparents should’ve asked your mom before phoning friends and random people though.