Every week I go through my step kids room. On Saturdays they usually go to their moms for the day and I usually snoop through their rooms. I check their computers, book bags, drawers, etc. I count how many condoms are left in the older ones room and I even read their journal.
My bio kids are young (6 & 3) so there really isn't anything to snoop. But I like to know what's going on with my kids. I won't become a grandma before 50! And there will be no kids plotting massacres or anything under my roof.