T-Mobile Hit with Lawsuit Over 'Unlimited' Data Plan

Many carriers choose to reduce the speed once going over instead to charge more to avoid billing argument.
Moreover, there's a rule called "fair use policy" to ensure all users get equal performance, so carriers has to run some methods to discourage some abusing practice (use mobile internet as landline internet or share connection with more than one computer, or stream for unreasonable duration (more than 4 hours @ 128kbps everyday).
T-Mobile still lets you to use internet with slower speed instead of send you trillion dollars bills or instantly kill you!
The guy will surely lose whatsoever because he doesn't read T&C. T-Mobile is liberal enough to let customers to tether with $20 or higher internet. Try to do this on other 3, they may rush to your home and kill you!