You are far more likely to get bitten moving a hungry snake into and from a feeding tub than you are by simply feeding in the snakes cage.
A BP isn't going to mistake you for food. I'm not saying that you will never get bit but if you do it won't be because your snake thinks that you are a rodent.
A BP uses multiple senses to ID potential prey, smell, sight, and heat signature. Unless you look, smell and give off the same thermal signature as a rat a BP simply isn't going to think that you are one.
Moving a BP before feeding increases the chances or him/her refusing a meal. This is especially the case when a BP is already not eating consistently.
Every major breeder and most of the vets here on BP.net feed in the snakes cage. It is a much better system.