i haven't read all this subject but i would like to point out that here in Australia the biggest isp Telstra has in the past (and I don't know about today as I have changed ISP) charged 15 cents per megabyte excess usage fee. So say 1000 megs to a gig and ... Yes that works out to $150 per gig.
Who is the thief?
So glad I am now on a throttle plan, I go over, I get dial up speeds. No shocks to my cash flow.