They're the bane of figure skaters, rink guards, and knowledgeable adult skaters; those adults who carry their kids on ice.
I once saw a woman drop her kid from her arms, trip on her toepick and fall on the kid!
If I can get the rink guard's eye, I point it out. Rink guard takes care
But sometimes there's no guard, or the guard is inattentive, or isn't looking in my direction.
What to do?
The other day, right in front of me, I saw a dad holding his daughter in one arm and taking a selfie while standing on the ice.
I skated casually up and said, "You and your kid look so great together. I can take a picture of you together." Dad puts kid down, hands me phone, I take picture. When I hand the phone back I said, "I just want to mention it's dangerous to carry a kid on ice."
A variation of this could work on almost every situation. Offer to take a picture, the adult will put the kid down to find the phone. I mean, GENIUS! and it ought to work!