[best_one_there]

You're right and it works, but people with eating disorders have mental health issues that push them into obsessive behaviours, they need to be trained out of them.

An anorexic could hear that advice and decide that well, 1500 under maintenance is even better right? Not great.

[mjbeswick]

It's going to be near on impossible to create a chatbot that cannot be manipulated into giving an answer which is user wants to hear. Even people are not completely immune to this.