What if my ISP / Mobile provider offers an optional service (and by default switched off), say at £0.01 cost, to do my blocking for me?
So that's a paid for service I specifically request. A fairly small tweak to what 3 offer.
I block via hosts on all devices, but then I'm a Reg reader and I know how to do it. Many people have no idea that you can, and would not be able to even if they did. 3 might not be able to be quite as specific / allow personal whitelists etc but it is a massive benefit to many people, a idiot idea to completely disallow it on point of NN principle.