The Dread Pirate Roberts reference is from the movie Princess Bride.
Wesley spends years building up an immunity to a fictional substance called “iocaine powder”, the most deadly substance known to man. He tricks a foe into drinking wine laced with it, killing his foe while he survives.
If kids have any form of tantrum, it’s because the parents let them and cave to the kids “demands”. Kids will keep throwing tantrums if it works.
Edit: You can downvote all you want, but regardless of the situation, if you need to take 3 pointers from an article about “tech tantrums”, there are some more serious issues at play and it’s not an issue with the child.