@Jody, I don't know about a specific AirBnB policy, but I've seen it recommended that hosts keep personal items or those of value - whether emotional or financial - out of the guest area.
I've read many threads on this forum in which hosts have described instances of theft and breakage (and for which many were later unable to claim). (You can access these threads yourself by posting something like 'theft' in the 'search the community box'.)
Those threads prompted me to rearrange my hall cupboards so that all clothing and jewellery is now in cupboards inside my own sleeping quarters. I also had a lock installed on the door to the small cupboard where I keep my jewellery and years worth of family photos.
In the bathroom, I took all items that were on shelves and put them inside simple, cheap, and attractive white cardboard boxes from Ikea, which I placed back on the shelves. That way, if a guest happens to open cupboard doors on the bathroom vanity, he/she won't be confronted by an unsightly assortment of lotions, creams, and other sorts of bathroomy items. 🙂