[Raphmedia]

Well, if I put a HD background picture on a website, I sure don't want it to load on a mobile and use all of this user's data. It only makes sense.

[swiley]

Don't put HD background images on your website! Desktops have bandwidth caps too and most people are only interested in the page text not frilly multimedia.

[J_Darnley]

Indeed. Background images were bad in the geocities age, background images were bad in the myspace age, background images are bad in the current tumblr age.