Did it attract any? The UCI is on rather shaky ground with the helmet rule, given how dodgily it was brought in and its utter failure to prevent further deaths as promised, plus the flouting of it by a large range of riders (I think Contador holds the record for longest unpunished bare-headed ride with 10km a few years ago?).
Would be interested to know if there was any punishment. But is it possible to know that it hasn't prevented further deaths? I think it's hard to know this given it's hypothetical?