One reason I always (pre-9/11) used to take just a small 'cabin compatible' overnight bag was that I could guarantee it wouldn't be out of my sight from packing to unpacking!
But now that even the most innocent item can be claimed by the bottom-fondling failed-wheelclampers as being prohibited, everything goes in the hold. So now when I collect my bag at the baggage carousel, I've no idea where it's been, what's been stolen or what's been planted.............