Talking about why is it realistic or not... - NO POINT
I could ask the same "realism" questions here: JGs, if there is a JH from Alpha to Eta, then another to Theta, why dont they make a JG directly from NY to NT/NB/NL?
So: trading BBs:
- isnt oorp
- cant be effectively enforced to stop doing it
- requies teamwork to be done