That's a pity, I like Velvia 100...
I'd much prefer an approach taken by other industries (take-away cups saying "caution your coffee may be hot" [I should hope so!!!], or "this product may contain nuts" on a bag of peanuts [I really really hope so!!!]).
I'd be cool with a warning on a film pack saying "do not lick or otherwise consume this film" or "do not suck your fingers after loading your film" and the like. I expect under my sink I have a number of liquids and powders that are at least as toxic and in greater concentrations and quantities than in my modest old packs of Velvia 100.