On my recent Mariner trip, I can only account for what I saw (don't know if there were more children or not). I saw 2 boys together around 10 - 12 years of age. They were fine, they were "playing ball" near the elevators but stopped when they saw us walking by. There may have been other children and if yes, they were so well behaved I didn't notice them.

There were 2 couples, (not together) each had an infant I would say less than a year old.

I had no problem with any of them, but I would have been annoyed if the infant would have started crying/screaming at dinner in the dining room, and yes, both infants by both couples were brought to the dining room.

One of the reasons I choose Radisson was because it was not considered "child friendly".

I have no problem with kids, but if an infant starts screaming during dinner, that would get to me.

In my case, I had no problems with any of the above, the rude people I encountered were adults.