Wow, I am surprised that so many are against some form of identification for carts. You have licence plates for cars and I bet you all have licence plates ! What is different with carts? Some compare to Orwell, some threaten there will be no ID on their cart (bet they didn't remove the licence on their car?), some compare to more Gov't controls, but like and acknowledge community standards,
I have nothing to be concerned with, I don't drink so a DUI will not happen, I don't allow young children so that is not a worry, I respect the walkers and bikers on the cart paths, and try to obey good manners. What is the worry of those who don't want some control over identifying who may be drunk, may be endangering other carts, walkers, bikers, et al. If there is nothing to fear why
be afraid?