Uh dangling a rat by the tail over the side for the snake to strike isn't what I'd consider humane for the rat either. If you have well cared for feeders of the right size, they don't understand the danger and roam the enclosure/groom themselves until the snake strikes. Even when my snakes grab the side if the rat inside as of the head, they're really good at coiling the rat enough so that they don't get bit.
I breed my own feeders now and really enjoy it. I'd never want to go back to F/T. Such a pain to do the zombie dance for the snakes. The snakes eat more consistently on live than they did on F/T too.