Well, legal accountability isn't the only kind of accountability. This is Bloomberg we're talking about, after all. This article links to their piece criticizin

Well, legal accountability isn't the only kind of accountability. This is Bloomberg we're talking about, after all. This article links to their piece criticizing GDPR, which they say is all wrong because the solution to privacy problems is "transparent pricing and more competition". So I think maybe what they're saying here is that Facebook needs to exercise judgement and be accountable to the market. I don't think I really agree with them, but it's a coherent, internally consistent point, and on-brand for Bloomberg.