this is such a funny topic. On one side you have the crowd that lives and dies by the "rules". On the other side, you have those who see no wrong. I fall on the later side. I've been the beneficiary of it and I've been on the wrong side of it once.
I've always thought, if its not a big deal, then why make it one. A few times I've been in Global First and the kids in Y+. I've taken them back cookies or sundaes. I have two kids, so I'm really not taxing the system by bringing them back a sundae. Although in this UA climate, they may only have enough ice cream to serve exactly the same number of FC or C passengers.
So for me, if its not a big deal and the team on board goes for it, then let it be.