It is a possibility i suppose, but i have never had a problem. I also have never had this method end up with a bite. Nor has this inhibited any of my ball's feeding responses or ended up with a refusal to eat. I have never really had huge problems with stubborn feeders, so i don't even bother to pre-scent. Obviously you need to read the snake's body langauge, but i think you are making it to be worse than it is, they are not blood thirsty piranha after all. They then never assume me opening a bin with food time. Less likelihood of a bite really if anything in my opinion.
I do cage maintanence before hand, then feeding after ... every sunday. They go into their clean new tub with a tasty treat waiting for them.
I am not saying everyone needs to do this, or you are wrong if you don't. All i am saying is i find it works for me. Try different things and see what works best for you.
Robin