Well, they survived through the 19th century with a lot of non-standard spelling around. I don’t think there would be much of a noticeable effect now—except that all the English Teachers and poor Gailcalled would totally flip their lids. However, once people got used to the idea of made-up spelling (which is how kids learn these days), there would be little problem. And I think people would get used to it pretty fast, except for those with a sense of righteousness about it.