A.S.
My boys are 16 & 13 and I don't see us doing it anytime soon. For us it is not a trust issue - I just don't think my kids would like it (and I would be worried sick). I don't even like when my husband is out of town.
I agree with Mimi that dorm life is not like being home alone (at least it wasn't for me). I never felt fearful in my dorm.