Well, I don't know about you, but I'm already paying sales tax, gas tax, property tax and other taxes to pay for roads. Personally I'm fine with that. Nothing wrong with using taxes to maintain infrastructure.
I'm more worried about what other uses the data is being used for. I find the idea of faceless individuals continually knowing everywhere I'm going sort of creepy and worrying from a civil liberty standpoint.
Of course the obvious solution is to put your EZPass in a Faraday cage of some sort when you're not using it for tolling. Or ride a bike, which is healthier for you and less amenable to tolling or tracking.