I believe the issue here is that, as a user, I expect the system to "do no harm". Sure, once you give bleach as an ingredient then all bets are off (although a

I believe the issue here is that, as a user, I expect the system to "do no harm". Sure, once you give bleach as an ingredient then all bets are off (although a good system would filter it out), but it highlights the deeper issue that some foods could be bad for my health and the system is letting them through. Unheated castor oil contains ricin, and even heated oil can cause contractions in pregnant women. Raw chicken can give you salmonella. A working recipe system should therefore never return "chicken sushi on a bed of vegetables with a touch of castor oil" without some SERIOUS warnings, but it's clear that this system may do so. Putting such a system in the hands of unsuspecting users is bad and they should feel bad.