This is why for large parties... primal fights through duty finder often, and always in ST when the minion drops, there's someone who doesn't roll hoping others leave. Even if I roll a sucky low number I always stay to prove a point. Ppl are like "Roll already!" which does no good. I'll just /sit and say "Ok time for a break I'll come back and see if I won later." A few more follow suit with /sit and it drops.

The worst was a glitch a few months back where if party members left without rolling, you could be the one class that could Need and you'd have to wait out the timer alone. But don't get tricked into having your loot you have sole need on held hostage by party members who don't roll so they can greed it.