idea: item lock things to the exterior of a house or doorway within a small radius. Items can only be picked up by the person who dropped them and/or the home owner.
There's been plenty written about interior home security and kicking folks out, but not so much about the outside. During Beta (I know, I know), one of my favorite things was to leave (and see) stuff outside friends & neighbor's houses (esp seeds & a drink for a housewarming treat). It's also really nice to come home to find a drink or something on your doorstep. However, lately my street has been plagued by street thieves. At first the firefly jar & gandlevery flower I decorate my doorstop with hung out for a couple days. Now it seems to last a few hours if I'm lucky and so I'm reduced to doing it only if I know someone is coming over. Drinks left at doorsteps disappear just as quickly. This is a sad but natural consequence of the growing world, but it does reduce some of the random community love feel of it. An exterior item drop lock would solve the problem.