It sounds like an old-fashioned a** kickin' is what is being planned... The "kid" in the chat room said they are organized and the whole town is turning out for the funeral.
Tell them to involve the Fire Dept. Place the scum on a section away from the place of service. Have the fire trucks placed in front of the scum buckets. This was done at the first one I'd heard of. I bet the Fire Dept. would back up this family.