i figure if they are hungry they will eat if it was bad for them thryd leave the meal
That's not true at all, most snakes would eat a lot more than what's good for them.
I could feed my Gaboons or Cobras, 4/5 times a week and I bet they would eat. But they'd be very unhealthy.
I personally, won't feed a snake in shed. What's the need? It's good to have a rest period for the snake, there are far too many overweight snakes. They're offered far more food than what they thrive on in the wild.
Shedding is also a stressful time, generally snakes in the wild will hide away during this period, and won't actively be hunting. They may eat should a prey item come across their path.
Yes, I know I've used the 'in the wild' argument, but shouldn't we be trying to keep our animals as close to wild conditions as we can?
There's no need to ram food down whilst they're in shed, they aren't going to die from one missed meal, if anything they'll be in better condition.