Trade System - Idea

So here's an idea for a trade system.
First of all, I don't really care about trading, for me it's all about the player vs player battles. Absolute.
Secondly, we need to keep in mind that spoofer and account hoarders are the likely reason why trading hasn't been introduced yet. So keeping that in mind, you have to think about how to minimize their abuse.

With that, I suggest that trading go like this:
-Only *ONE* trade between any two accounts
-Each pokemon may be traded only *ONCE*
-Both pokemon/players have to be traded at the same time while within range of a gym.

This will do a few things. It may not eliminate the full "advantage" multi-accounters have, but it severely reduces their options to a single pokemon trade.
The reason for a pokemon to be able to be traded is to prevent daisy-chaining to get around this loop-hole. In reality, how often do you need to trade a pokemon anyway?
Thirdly, this'll put some value on who and what you're trading, adding more of a value and thought into to each trade instead of just mindless trading.
Lastly, this may be another layer of rarity that will be placed upon the pokemon, "is it 'pure?'" players may ask.

TBH, I wish Niantic would do anything clever at this point.