It is malted once the stem is 3/4s the length of the grain. The stopping an roasting is to make it keep in storage an to add flavor in beer. In distilled spirits malts are used fresh, wet an still growing. But its still malt.
Anyway the danger is still the same what ever ya want to call it. Bucket full of wet grains is a bad idea. Under water is one thing but just wet is a cooking pot for bad bacteria.
My understanding is that till the sprout is about the same length of the grain it is almost completely producing enzymes an sugar. After what is called "over malted" when the stem is over the length of the grain is when it starts producing lots of proteins from those sugars. Proses starts good in corn when the stem is 2 inches. Between those points your talking mostly sugar an enzymes, that are different than the unsprouted grains anyway. Thats why distillers use it then. Thats what they want, sugar an enzymes.
Not a plant biologist tho, just what the old times have told me.