So Jens (Jeb_) has confirmed that in Legends and the Minecraft Movie, Piglins invade the overworld using Netherwart to prevent the zombification process
10:56 Baby piglins are passive in any difficulty. They run away if provoked. So, they are very cute as always. But, they are naughty because if you barter gold with them, they will steal without giving anything in return.
Good to know about the other difficulty levels! But RE piglin children not giving anything when taking gold, I think I've said it before in another comment, but do we expect human children to fully understand commerce?
