I've never answered one of these before. There's a first time for everything, and the answer came so quickly to my head....

If I could smash anything in my home with a crowbar it would either be the door to my daughter's bedroom or the lock on it. She's 18, and it's not that I suspect that she's doing anything wrong in there, in fact, she's usually studying or reading. But there is a hostility there, almost tangible, around her locked door, that makes me want to breach the door, and leave it open all the time. She doesn't want people in her room, is locked in there most of the time that she is home, and yet complains that she is not part of family life. It's frustrating. 

In September she'll be off to university, and I doubt, except for vacations, that she'll ever actually live here as a permanent resident again. Maybe then I'll regret the open door, and wish that she were here, even if it is behind a closed door. Anything to have her home with us, and not away, starting life as an adult on her own.