You can buy and load data/minutes on SIM cards in the US with cash without an ID. I've had cell phones delivered from many different vendors without requiring signing for the package upon delivery, plus pre-paid phones are available for purchase with cash all over the place without the need to hand over personal information.

I can ride the light rail all over my city through buying a pass with cash. I can ride in the car between all 48 contiguous states without needing an ID. Going through TSA checkpoints or leaving/entering the country are the only forms of travel which require an ID or filing a form essentially equivalent to an ID.