So I used LH's online feedback facility to complain. This is the reply I just got:
Thank you for your online feedback dated 5 December 2013. We appreciate your patience whilst awaiting our reply.
It was with great regret that we learned of the situation you describe onboard Lufthansa flight LH1226 from Frankfurt to Geneva on 4 December 2013 where you mention that the appropriate safety measures were not taken. We certainly understand how upsetting the situation must have been for you, especially since you expect a convenient and reliable service from us. Please accept our most sincere apologies for any inconvenience this situation may have caused you and your fellow passengers.
As stated in your feedback, you are anxious about the safety of our flights. As safety is of paramount importance to Lufthansa, we have uniformly regulated selection criteria and training standards worldwide in order to ensure that all the members of our cabin crew are qualified and well trained. We are therefore very sorry to learn that this was not the case on 4 December 2013. Our cabin crew are expected to do everything possible to hold inconvenience to a minimum and we regret that the way the situation was handled on board was not in line with our usual high standards. It was obvious that we at Lufthansa, who pride ourselves on a long-standing record of commitment to quality and safety, have given you a cause to be disappointed.
Nevertheless, there are a lot of influences to consider, and of course we cannot predict the results in advance. However, we can only hope to assure you that your complaint has been copied in to the relevant department concerned and in to our Senior In-Flight Management as this gives us an opportunity to address your issue. On behalf of Lufthansa, may we apologise once again for the problems surrounding this journey. We do very much hope that we will have the opportunity to reassure you of our usual high standard of service.
Thank you for your valuable feedback regarding Lufthansa’s cabin safety procedures and cabin crew awareness, your feedback has attracted our interest. Therefore, we have taken the opportunity to address this matter internally to the responsible departments. We will analyse our current service procedure and consider changes in order to accommodate your expectations.
Direct feedback from our most loyal passengers is always greatly appreciated as your comments and observations give us the chance to further improve the services we offer to our passengers. We thank you for raising this issue with us and presenting us with the opportunity to pursue this matter. Although, we realise this situation may have compromised your faith in Lufthansa, we remain hopeful that you will afford us the opportunity to regain your confidence on a future flight.