I don't know anything about the actual legal responsibilities, but even there aren't any, a defrauded customer takes up support resources just having the conversation about it. Upset customers (regardless of how well placed that upset is) will complain about it in reviews etc.
A lot of people aren't able to distinguish "I got scammed" from "the bank took my money away".
A lot of people aren't able to distinguish "I got scammed" from "the bank took my money away".