Post #5 is not to be taken serious.
GMs already send No Drop items through mailing system.
Hard/tedious parts might be; applying limitations if needed, validating a characters linked email if the link was created through a player command, and fixing every possible way players find to break it.
Wouldnt #1 tanks sending their Jyres to fresh level 65s be the talk of the town? (or Adept bots)
Maybe you dislike Necromancer mana and want to send your INT based items to your new wizard.
Maybe Enchanter soloing angers you, send those INT items to your new mage (But because you can only link once, you find that you also don't like mages. Post a new thread and then quit)
Maybe you want to have a tank alt, but don't want to endure years of verbal abuse.
Maybe your a particular individual who is master of every crafting skill and don't like how you zone so slow, send all those items to linked banker.
Maybe your a melee archtype and have finished your character to what you determine as "finished" and want to start a new character but have limited time because of RL. Can send a majority of equipment over, but still have quests/xp/last few pieces to hunt for.
As boxing is allowed, I've always viewed my two characters as one character unit. Its really nothing more than mutually shared inventory.