Even if you are confident of that, your infrastructure and advertising partners may not be and may cut you off. A court judgement demonstrating it is definitely

Even if you are confident of that, your infrastructure and advertising partners may not be and may cut you off. A court judgement demonstrating it is definitely not enforceable in the US certainly has value. It would also be more likely to cause other businesses to adopt the same tactic, which would drown Ofcom's resources to cause further trouble.