I also have a particular aversion to labels on behaviours and incidents when it comes to Court matters. I've said it many times before - the Court deals in facts, not speculation, and labels posted by a party in family law is always speculation. It's the actual behaviour or incident that's the fact, and it's up to the judge to decide what label is appropriate for that particular behaviour or incident.
So, my thoughts.
Telling kids to keep some secret is maybe poor form, but the reasons parents have provided for doing this are not always that farfetched, either.
Let's say dad takes the child 4x4ing. Child excitedly tells mum about 4x4ing, mum decides 4x4ing is too dangerous for child and slams dad accordingly. Dad knows the child is not in any danger, so dad continues taking child 4x4ing, but tells child not to tell mum so they can both avoid the drama.
Another example, let's say parents share first right of refusal for care of child when the other is unavailable. Mum sees on social media that child is spending time in paternal family's care while dad is at work, so mum advises dad that she is available to care for child. Dad then tells maternal family and child not to tell mum who collects child from school so mum doesn't know when dad is skipping out of his first right of refusal obligations.
I'm not saying this is ordinary parental behaviour, but it is not that uncommon, either, and quite often, I find myself asking whose behaviour is worse - mum who slams dad for taking the kid 4x4ing, or dad whose response is to tell the child to keep secrets from mum. The worst ones for me are actually the ones who believe themselves to be completely innocent of any wrongdoing.
The key point, though, is that both parents are making perceptively poor choices that achieve naught but to make life very difficult for the child in question. Mum's making the kid feel guilty about enjoying 4x4ing, dad's making the kid feel guilty for telling mum about it.
Both parents in this hypothetical situation are putting the child into a tug of war that results in zero winners, but it's the kid who loses the most.