French operator SNCF has previously asked passengers to self-declare as ‘Monsieur’ or ‘Madame’.
The EU’s top court ruled on Thursday that requiring rail passengers to declare a gender when buying a ticket is in breach of the EU’s General Data Protection Regulation (GDPR).
Their mistake was not to add the “prefer not to say” option, now they can’t collect any gender stats.
I think it wouldn’t fly either since verdict was that this is GDPR problem - there was no need to collect this info.