I'm older than you. There have always been 18 year olds or even older with a curfew.

This isn't Hoovering. This is consideration.

At my house, you're in before 10:00 as long as you live in that house. You wantinf to party doesn't give you the entitlement to disrupt your sibling's sleep cycle and interfere with their education just so you can go out and run around.

Lots of kids have to share rooms.