Maybe Ledger should put notice in every package "Do not enter your seed words anywhere except in your hardware wallet", and all that on white paper with big red letters.
Both the manual which is shipped with Ledger devices (available here to view, page 22:
https://support.ledger.com/hc/en-us/articles/360007061974-User-manual), and the support pages on their website (
https://support.ledger.com/hc/en-us/articles/360005514233), state pretty clearly to never share your phrase, and to never enter or store your phrase on any electronic device. Additionally, the pieces of card which come with Ledger devices for users to use to write down their recovery phrase say "Confidential - Do not disclose", or something similar (there are different versions) on one side or at the top.
If they give crystal clear instructions, and the user either doesn't read them or doesn't follow them, then I don't know how much you can really expect Ledger to do about things like this.