I don't see what's frivolous about it. I hate liquorice but had no idea it was dangerous to consume in quantity,a nd in general I'm quite health/diet conscious.
it's frivolous because it's silly to think that eating a large amount of anything with total disregard for healthy nutrition won't result in some kind of unhealthy outcome
I think the difference is between "eating a lot of this will make you feel bad" and "eating a lot of this will make you ill and possibly kill you".
Those are quite different levels of unhealthy outcome. The trouble is, people don't think something sold as a candy would fall into the second category.
Here in the UK people would call for the government to regulate that it must be labelled. Then if it wasn't then a lawsuit might be brought. But first port of call is just to get it changed.