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fries - completely ok: a lot of people get in contact with them, but putting sign on them while not putting warning over any other harmfully (over)fried products seem at least illogical(yea, creating regulations doesnt work in us, or at least there's no efficient mechanism, but still)

sand - widespread construction material, i wonder why they only put label regarding cancer instead of placing usage restriction over maximum allowed radiation flux produced from square meter area of material(some decorative stones would not fit into safe range but are ok for a lifetime risk of any person)