There's absolutely no way that you could be placed in QSF&B if you did not put it down. I'm friends with many people that work with the CP and they are not allowed to. If you are placed in an area that you did not select, then you need to call your recruiter immediately. Always have a copy of the final form you submit showing what you did have selected for possible roles. They cannot place you in a role you did not pick as wanting to be placed. in.
I'm sorry to sound rude, but if someone is saying they didn't select a role, and then got 'forced' into it, that is a lie. They did select it, or the interviewer confirmed that it was ok to put them down for that role. If you question you saying that you DIDN'T want put into a role over the phone, they can pull up the recorded intererview and go over it with you.
Disney Casting is very strict to the recruiters about not letting potential CP's get put into roles they did not select.