JSONP lets the server turn off the same-origin policy. If XRFing your data is dangerous, don't use JSONP. But often we don't care about XRF, and the person wr

JSONP lets the server turn off the same-origin policy. If XRFing your data is dangerous, don't use JSONP. But often we don't care about XRF, and the person writing the server is well-placed to know.