1. Never feed live unless the snake absolutely won't eat anything else.
2. Hamster fur is hard for them to pass and digest.
3. Hamsters are very aggressive if live and you can't buy them dead so what, you're gonna murder a bunch of hamsters?
4. They have a much higher fat content and lower overall nutrient content.
I'd recommend against it. It's nice that you want to add variety to your snake's diet but it's not necessary. They can't really "taste" and as long as they are getting a full spectrum of necessary nutrients they're good to go. If you're worried about them not getting enough vitamins you can use a powder or droplet supplement although they aren't usually necessary unless the snake is malnourished or recovering from an illness/injury.