Good lord what's a rat ever done to you? I'd hate to have to list all the things (quite a few of them man made) that have wiped out large numbers of the human population over our history on this little green planet.
As far as feeder rodents go and the euthanizing of live prey, my thoughts have always been the same. The respect I show the rodents I raise for feeders for my snakes is an extension of responsible snakekeeping. I'm very aware, as are most of us, that without that prey animal we would have nothing more than tubs of very dead snakes.
You don't have to like rodents, but I think that refusing to do what you can to euthanize humanely shows a distinct lack of respect to a creature that is the only food source that sustains the life of your precious snakes. There is information up the ying yang on this site and all over the web about how to easily and humanely euthanize a feeder rodent. I cannot for the life of me think why someone would choose a method that would be considered by any labratory or even rational layperson as cruel and unnecessarily inhumane.