Yes. We had two confirmed players who were ACTIVE in the EB who left before it was finished. We did this for both FoD and Destroyer. FoD dropped 3 swords and 2 treasures. Destroyer dropped one shield and 3 treasures.
Nah. They have already tried having everyone leave the eb except for one person, and there was no drop. There is something else to it. More testing is needed.