Gotta love all the ritual incantations one has to perform to "keep your website safe" these days. Worst of all, people are clearly bragging about possessing this arcane knowledge, instead of constantly complaining about how stupid the whole thing is to begin with. "Responsible developer"? Hah.
The web needs a real security model relevant to what browsers are doing today, not these piecemeal hacks ducktaped to a hypertext delivery protocol.