why doesn't google use html5 sandbox feature on iframes?

limit damage of bad advertisers

[amznVibe]

I'm getting tired of reports of ads in adsense that do (new window) popups or alerts that change page navigation.

Using the html5 sandbox feature on iframes would stop 99% of this stuff and is available in all modern browsers except IE9

So why doesn't google create the iframes with sandboxing?

[woody midrib]

This probably wouldn't help much as long as Google still supports Flash ads. You can do a even more nasty things with Flash than with JavaScript. Using the script blocking feature of the sandbox attribute is also not an option since ads rely heavily on JavaScript.

[amznVibe]

No you wouldn't block script. You would block page navigation changes and other nonsense.

Flash doesn't run on virtually all mobile devices anymore, which is a good thing.

I'm wondering if I can increase frame sandboxing after domcontentloaded, will have to experiment.