Yes if not done responsibly, but it is safe if done responsibly as well.
It's about being educated and knowing how to properly feed live.
I feed 250 live preys a months (not counting hatchlings, that's a drop in a bucket compare to some) and have done so for 9 years with my breeders and holdbacks and NEVER had an issue.
The keys to success
Pre-scent the room bring the feeder near the enclosure 30 min prior to feeding.
Give food and water to the feeder if you purchased it from a store.
Do not stress the feeder.
Do not feed an oversized prey
Drop the feeder and remove if uneaten after 15 to 20 min
So do you have to watch over each snake until its eaten the prey safely ??
That must take much longer than simply defrosting and offering .