oh boy here we go...
Rfid's for the most part are GREAT, please note the key words "most part"!
Rfid's are implanted into pets so they never get lost, they are also starting to be implanted into people, people who often fall very ill very fast, one quick scan and the ems and or hospital know all about the patient, they will soon be in your clothes, now this is where we start to have a shift, they can be used for good, such as alerting you to sales on similar products to what you are wearing as you enter a store, or other stores can give you a small card to keep in your wallet and when you enter that store it can tell you about new things you might like based on what you have bought before, or again alert you to sales on products you already love.
but on the other hand, there are lots of not so nice things that can be done with them as well, which for the most part is talking about dirty marketing techniques and the like.
I think it comes down to this, Do you have the rfid by choice? if yes, then they have given you the choice to use a cool new tool or not, if not then anything after doesnt matter because they have started by tricking you which is wrong.
I dont know, like anything else it's all up to how they use it.