Specifically, this post from their blog illustrates how far NFSN will go to defend their users against anybody (in this case, the UK government) who tries to bully them without proper authority.
The official lawyers for the UK government are basically saying on official letterhead (even their own filename contains “Letterhead”), “Hey, we heard you’re small. Well, we’re the world’s 6th largest economy, so we can put you out of business with legal bills if you don’t play ball.” Now, it’s not super-unusual to see a lawyer say something menacing about how if they win, you’ll have to pay their legal fees — even though that’s often not true in the US. What’s different here is that they dropped “if we win” and added “we will ruin you.” Stating that if someone doesn’t cooperate, your strategy will be to run up enough legal bills to put them out of business whether you win or not is a little different. It’s the sort of thing you expect to hear from the smarmy thug lawyer for the big bad corporation in a formulaic TV legal drama. We don’t generally see it in the real world from the legal representatives of a developed country.
Fortunately, they heard wrong. Our excellent legal team is ready, willing, and able to vigorously defend us should the need arise.
So, the story so far is that we asked to have the proper legal process followed, and the UK’s lawyers threatened to destroy us. Despite this, we are refusing to censor our member’s site. We steadfastly believe we are under no legal obligation to do so, that we will prevail in any US legal action that arises from this matter, and that any attempt by the UK government to spend us into oblivion will fail. More news as it happens.