Actually, it may well be. Depends on where you are, where the website is hosted, and whether any of the fiber(etc) your packets traverse cross state lines...
No, stealing a candy bar across state lines is also not a crime under the CFAA.
(Wait, it might be. I misremembered what the dollar minimum in the CFAA applied to --- the dollar limit is why you can't be charged under the CFAA for stealing airplane wifi, but things of value other than computer service itself have no dollar minimum I can find.)
