Sure, it's not a big deal to put up an imprint – but what's all this cease-and-desist nonsense? If laws are now only being misused to enforce wrongdoing, then it's high time we changed the laws.
The fact that a central authority against unfair competition lends itself to such rubbish says a lot. What kind of legal understanding does it take to abuse an apparatus designed to protect economic interests to beat up on a private website? And how do they reconcile that with their own mandate: as a cross-industry association of companies and business organizations for the purpose of promoting commercial interests within the meaning of § 13 UWG throughout the federal territory? What kind of promotion of commercial interests is present in such an absurd attack? Sure, now all sorts of people will cry out: but it would be commercial for these-and-those-absurd-reasons – maybe because of banner advertising or whatever else – and then they'll immediately tell you again that the law is simply unambiguous on this and that the competition authority is in the right. So what? Screw being right! In Germany it's only about being right anymore, no matter how absurd, how ridiculous, or how stupid the occasion is. Stop to think about whether the action is even appropriate? Oh come on. Why would you, that would overload the poor little brain...