Genuinely not recognizing a charge is not fraud, as that to me requires intent (or at least gross negligence, e.g., something like "I'll just dispute everything I don't remember, and not make a particularly good effort to remember anything at all").
"Just fraud" is already taken for "criminal c uses unwitting cardholder a's card at unwitting merchant b", so what's your objection against "fiendly fraud"?
Even in the post you're wishy washy about what you want. They offer a product that does enhanced fraud detection but you don't like that. You correctly call out that there's major risks with taking a merchant's report and using it to flag a user's future transactions.
"Just fraud" is already taken for "criminal c uses unwitting cardholder a's card at unwitting merchant b", so what's your objection against "fiendly fraud"?