When I started out I used to move to another enclosure. Not from any myths or fear, but because I thought it would be more convenient to clean the cage while they ate.
Wrong.
Feeding out of their home, especially once you have more than 2 or 3 snakes, is unnecessary and actually a lot more work.

1- It takes a TON more time to move them, give them their dinner, wait till they swallow it and rest a bit, and move them back then it does to just dangle the meal in front of them and let them take it.
2- MUCH less stress, on you AND the snake.
3- Less chance of being tagged, or of the snake regurging from all the commotion.
4- Just a paper towel or piece of cardboard can protect from ingested bedding. And even if they DO get a piece in their mouth, they can usually work it out on their own or swallow it...which doesn't hurt them one bit.
5- The 'associate the hand with food' thing is a total myth. Even so, if you still worry just pre-scent the room on feeding days and get the snake(s) on a regular schedule and they'll never confuse the days.

All in all, it's just safer, easier, and faster to feed in the home enclosure.