Even if we had a law like that, you could still get "prosecuted", i.e. sued by the govt for whatever reason. Depending on the DA, they may even bring prosecutions to "make a point," knowing it won't go anywhere.

That said, this case seems to be tossing into a gray area any plugin or browser or browser version that alters the "expected rendering" in any way. So if I wrote my website and only tested with IE, and you opened it in Firefox which due to a rendering difference reveals something I didn't intend to be revealed, this government would presumably try to sue you...