Please allow tagged characters to trade.
I know this has been said many times before but I feel it needs reiterating. There are other solutions to avoid exploitation; Ideally whilst you have trade items in tagged character A's or their mount's inventory you should be unable to switch/log in to tagged character B and vice versa.
The way this has been implemented punishes anyone doing lifeskills on their main and in my opinion should really be fixed before any eventual trading update.
An additional note for this is that characters with trade items in their inventory can't use the Magnus, so if you're tagged, you have literally no option but to delete your items if you want to use Magnus at all. I strongly agree with this post.
Better solution to keep exploitation to a minimum is to allow tagged character to get rid of trade items (Gathered Items, Drops from Caravans, or Trade coins and fish) is to allow only deposit of a trade item into a storage but not the pick up from storage similar to the graying out in magnus of the items just not being able to be moved. These trade items have to be trashed at the moment and it is the one thing from stopping me from tagging characters.
By not allowing the taking out of storage the picking up then swapping and running and swapping back is made mute as there is more hassle than any benefit as you still need to drop them.