You are being pedantic.

> Step 1: cryptically warn people that their rights are under attack.

They are, UK is heavy surveillance, there is an article on Wikipedia dedicated just to this subject. https://en.wikipedia.org/wiki/Mass_surveillance_in_the_Unite...

> Step 2: tell people that you have been banned from saying any more.

They said their ad is "banned from TV" because they offer a way to circumvent internet surveillance.

> Step 3: Conveniently make no mention of the fact that this highly controversial 'banned' ad is absolutely watchable, in the UK, on youtube, with links to it from traditional media adverts.

Because it is about TV... what does YouTube have to do with this? It says on the damn Ad "Banned on TV".