[newman314]

Unfortunately, this does not help with mobile devices which do not have the same capability.

Well, I guess you can always maintain a hosts file but that's the only way I can think of.

[aerique]

There's Firewall iP for jailbroken iPhones. Also one can install other browsers than Safari from the Appstore and, for example, iCab Mobile has the ability to use filters (and comes with some).

[newman314]

Mobile devices != iPhone+Android. I find this trend pretty disturbing.

[aerique]

I didn't even mention Android. I just gave an example of what's possible on one type of mobile device.