I liken it to an all you can eat buffet. If you sit down on Monday morning at an all you can eat, do you think they'd let you sit for 3 days straight and continue eating meal after meal?
The point that you're making is consuming something within reason.
At an all you can eat buffet, it would be unreasonable for a person to sit down and eat for three days straight, though I'm sure that there are very hefty people who would disagree. To continue with the same metaphor, it is also unreasonable for an all you can eat buffet to limit a customer's consumption to a specified time, for example, 35 minutes. And yes, I have been to an all you can eat where a sign is posted at the entrance that looks like, "
All You Can Eat within 45 minutes".
This is exactly what AT&T is doing, giving you the all you can eat option and putting the unreasonable limit to the buffet.
There are people that have an unlimited plan but only consume a couple hundred MB per month, let's call them extremely light eaters. Then there are people who do consume upwards of 1-2GB per month, let's call them light eaters. Then there are those that consume well over 4-6GB per month, we can call them moderate eaters. Finally there are heavy eaters like me who normally consume around 10GB per month. All of this is subjective but I think that even with heavy users, that kind of usage is well within reason for a 30 day billing cycle.
When I think of unreasonable use of 3G wireless data, I think in terms of 220GB per month. That kind of usage means streaming data every waking moment during a billing cycle. Again, my 10GB of "heavy use" is well within reason compared to 220GB.
I read the email that AT&T sent me about being in the 5% club and there was a sales pitch for getting off the reduced speed of unlimited and stepping down to a tiered plan with full speed. The only catch is that the tiered plan is capped at 4GB and costs a lot more than the unlimited plan. In other words, AT&T is capping the less expensive buffet and forcing you to order from the more expensive a la carte.