If 95% of all practical implementations of a concept are bad implementations then I don't have a good idea implemented badly. What I have instead is an idea that fails to work when faced with the real world. I'd say it's warranted to call that "a bad idea".
Don't be intentionally obtuse. Reframing the parent comment as "the _only_ concern (all) people have is poor QR code menu implementations" is disingenuous and myopic.