RYR cabin crew carry a licence, but I don't know whether that is an IAA or just a company thing.
I would dearly love to see a change in terms - if they were called cabin safety crew, then it'd cause a change in mindset towards (and in the cases of the small minority of their more immature members, by) them. In the same way, I hate being referred to a Flight Deck - it is a deliberate misnoma that encourages others to dehumanise us and think of as as an aircraft component rather than a trained professional. Call the cc safety crew and I reckon it'd change passenger attitudes quite quickly and management attitudes too, eventually.