Offline
Communists.
I wouldn't judge to harshly right off the bat. Some folks might be out of the house 9 hours or more every day at work, and then when they get home they might go online for 30 min to check their email. An example of this would be my mom. Pretty much all she does is check email and bank accounts once a day. But I know she's paying for unlimited service and doesnt really have a choice. Folks like that might benefit from a pay as you go plan.
If you are opposed to internet providers to charge per minute of use, are you also opposed to cell-phone providers doing the same?