I think that the intent behind the dialogue in Black Mirror would be more pernicious than any f-bombs. It's generally a bleak show. Even the episodes with happier endings tend to have grim moments.
The show deals with dark elements such as extortion, murder, slavery, rape, oppression, censorship, xenophobia, jealousy, capital punishment, corruption, and greed. These are far more uncomfortable to watch than any f-bombs they throw in there. Really, if you're going to tackle those terrible tenets, then there's no point in being shy about f-bombs.
I'm a little surprised to see White Bear so low on Rob's list. What about that episode didn't you like? I rather liked the mental screw that took the audience for a ride (main reason why I show people Dark City while fast forwarding past the spoilerific narration at the beginning).
I'm also a little surprised about Silverspawn ranking Nosedive so low. Why no love for that? Though it admittedly is a bit derivative of 15 Million Credits.