Please forgive me for giving some professional advice: It is unlikely that we see a higher court's decision on this. As the local courts are competent for all disputes up to 5000 Euro and I cannot imagine an unrefundable ticket costing 5000 Euro, these disputes will always be with the local courts. Even an appeal is unlikely. Decisions on disputes under 600 Euro (in general) are only appealable if the local court allows the appeal. This only happens if the issue is of general importance. Allthough this issue might be important for this community, it is not really of general importance. And anyway: Even a higher court's decision would only be binding "inter partes".

Cheers
T.