It seems that all the people who decide to drop mass amounts of DB/Amulet end up being people who are cloaked/hidden in some way. I suggest making it impossible to do that, as it just promotes them dropping those items on people who cannot see/detect them.
And, it seems it might be getting close to time to add a cool down to the Amulet, or restrict the maps it can be used one, like what was done to the DB. I have seen GX, Stalker, and Rangers doing this, just so they don't end up killing themselves, and can stand right beside people to kill them(watched a GX do it to two of my alternate chars, while I was on the third not long ago).