This is a theoretical talk. I am talking about the gratuities for a 3 year old kid. Which I would certainly remove (if I can), because I think such young kids should not be charged gratuities, this sounds crazy to me.
But we only are sailing Celebrity alone w/o kids, because if you are talking about a cruise with kids it would be a sensational waste of money to book them as so many others do "kids sail free".
And to make things even more complicated we usually book our cruises in Europe. Where Celebrity only offers fare with all fees, taxes and gratuities included. Price is final. So there is anyway no option to cancel or adjust any gratuities, no matter if kids or adults.
We only sail MSC with the kids, also here it is very simple, the gratuities cannot be removed or adjusted, adults pay $ 14.5 per night, kids from 2 to 12 pay $ 7.25 per night, kids under 2 are free.
So I never had the chance to cancel the service charge for kids (which would have been possible in the old days), but if the cruise line would give me the option to do so I would happily do 🙂