Did this card ever receive a change after John Earley attempted to abuse it at Nats '10?
The Official Errata thread lists the following:
Angry Mob - Spin card sideways (two full rotations to count). Top of card must be facing a player over halfway to count. If not, spin again. Targeted player turns all Heroes in territory and set-aside upside down and then mixes them up. Discard one of those Heroes. Under advisement
Has the "advisement" period finished? My understanding of what John was trying to do was leave your heroes face down because the card doesn't state what to do with the heroes not discarded.
Kirk