The fear that exists is that a small number of consumers will end up costing the provider a significant amount of money through excessive consumption. These users tend to show up first because they are shopping around for the best deal for their situation. This leads to behavior to attack the heavy user at the cost/risk of annoying your good customers. If you grow large enough, though, you can virtually eliminate the heavy communication user effect through averaging.

Of course, they will still light up your fraud/abuser alarm board.