I currently don't use any ad-blockers. The issue I've always had is what if the software decides that something I did want to see should be blocked. In most cases especially when using a program from a trusted source this is rarely going to happen and blocked code is vetted by a community. 

The issue is, how much input will people in general have when it comes to what is blocked by a internet service provider such as three. Hopefully if they do decide to go ahead they will make the software easy to switch off and also make it simple to report any errors.

I hope they don't plan on using this as a means to charge companies to allow them through the ad-block.