ISPs are private service providers and should thus be able to have some filters on the most extreme spectrums of extremism  ISPs are ultimately private providers of a service. Because of this they should retain the right to restrict that service to certain groups. So long as ISPs make public their policy for what constitutes extremism so that consumers can decide if they want to opt into it, there is no real issue. There are many filters available to users to screen out certain materials already, for example internet providers offer customers the option to block adult content, [1] and this is merely an extension of this approach. Businesses must be able to sort their own ethos. Some ISPs may not opt to use this power given to them by the state, but others may not wish to carry content they consider dangerous. Because extremism is on the very fringe of speech and opinion, and because of the potential dangers that can arise from it, it is only right that the state give some ability to ISPs to block objectionable content.  [1] BBC News, “Internet providers offer parents bar on porn” 11 October 2011,