You're still complaining about floats, and now JavaScript, neither of which is relevant to JSON. JSON is perhaps named poorly, but it merely "was inspired by the object literals of JavaScript" (quoting the spec) - there is no reference implementation, and it is defined by spec.

I also don't really see what alternative you're implying. If you want a human-readable format, but need to express non-integer numbers, what do you suggest we should do?