The rat has a chance to take a piece out of your snake before it is completely constricted. I used to feed live to my BP and he suffered a bite from a young rat. Fortunately, the skin wasn't broken so risk of infection was minimal but I stopped feeding live soon after that incident.
You make your own decisions. I just think that you'll find that most herp keepers are sold on the frozen/thawed idea.
Why are there braille dots on
the keypads at drive up ATMs?