No wonder empty wine bottles are littering even the nicest dungeons. The most environmentally minded necromancer would not be able to dispose of them properly in the dark of night without having to lose all self respect by dealing with lowly and hard to find thieves guild fences. Our hapless and self-respecting necromancer would have to boldly venture into town during daylight shopping hours to return his empty bottles, or wait shuddering in the cold for the next khajiit caravan to pass by. I mean, seriously, this just will not do.
