That currency is offensive to the increasingly large number of Americans who do not or can not "work", or choose not to participate in the soul-destroying crapitalistic exchange of slave labour for artifically-backed so-called "currency".

(Please don't downvote me, I don't actually feel that way, but that's the reaction I would expect from the current culture of the easily-offended.)

I rather like them myself, though I agree they're a little on the impractical side. I do wish we'd consider something more radical of a design change one of these days, if for no other reason than to at least make the current counterfeiters have to go out and get new equipment.