Making food from obviously rotten ingreedients is not akin to something that would fall under good samaritan laws. However I don't agree that you should be liable for providing food to those in need if you have made reasonable safety precautions. Restaurants throwing away their leftovers rather than be held liable is not a good thing for society. So no, I don't think software should have a special place here but rather that someone trying to "do good" should not be punished for it even if they mess up a bit.