People should just learn to eat their fruit, veggies and rice (and a steak once and a while) instead of all the preprocessed food. No additional flavouring, colouring, sweetening etc. No extreme quantities etc. 99% of the people knows (common sense) what is good for us and what is not. Tagging food with technology will not change our habits to eat too fat too sweet etc. Adding RFID's will not take the cause of that behaviour away. Let the food industry start with telling us what is in it.
I agree it might help people who want to change the above behavior, and it has its uses in hospitals and even with some allergies. However I have seen to much technology having too much side effects in my life to trust this one. And who will check the contents of the RFID's?? If the RFID says its a pear and it is in fact an apple, who is right? OK you may laugh now, but it is no different from hacked id's or passports.
I would like RFID's in my electronic's, easy to sort a bunch of resistors etc.