[dekz]

    but it would, at the same time, infect so many important and popular sites on the whole web, I can't even imagine my sites being targeted.

Maybe, or maybe it's exploited to target only your site by detecting referrers and only serving your site malicious javascript. Thomas is correct in arguing to host your own.

[pestaa]

This implies I can do it better than Google or any other big-name-company CDN I happen to trust.

I don't know about you or Thomas, but this isn't true for me.

[tptacek]

You ignored the point I'm making. You don't have a choice but to do "static file hosting" securely.