In my 4 years of playing adventurers (had two killed by undead, and use two of my character slots for adventurers) the only way I have seen items acquired is from alphas, buying, trading, or judges stealing them. If there is an automatic code that lets advys find dropped items when entering/leaving a region this us the first I have heard of it. Granted I never new if I was in a region where that happened until today.
Gathering has never done likewise. It would be nice to know for certain if that is a possibility.