Earlier quoted context omitted.
This is exactly what happened to me after I bought a MyTouch 4G which allowed wifi hotspotting for my laptop. While I was not charged overage fees, my data rate was crippled to 57Kbps. The thing sits in the drawer and I NEVER use it because its useless. I am paying $100 a month for it. They want $400!!! to cancel it. Fuck these carriers.
I’m not really sure why you are angry at the carriers. Knowing about the limits and how much you need is kinda your job. I know that I need at least half a terabyte per month when I’m using my laptop and I know to always check how much bandwidth I can get from the carriers. Your responsibility.
While it is perhaps somewhat legitimate to criticize an HN'er for failing to calculate the rate at which a data plan will be consumed at a given bandwidth, it is of questionable appropriateness in regard to the general public.