So far we have been trying to attack the problem at its core, blocking p2p but that hasn't worked out so well. We have tried a couple of software based firewalls (squid and endian) that just didn't do it. Also have have just pulled out a Netgear prosecure UTM that made a small dent in the traffic but not enough.
So the next thought is to get a better hotspot that can allocate say 1gb of data to a client per week or whatever they choose. Anyone know of such a device? I know Zenbu etc have these devices but the backpackers want to purchase the device outright instead of paying a slice of each transaction to another company. The zenbu is just a modified linksys as well which is a major putoff (we sold those models a few years ago and they nearly ALL came back with dead ethernet ports, and im talking 100+ routers)