What will you do if you toddler throws a tantrum in public places?

Throwing a tantrum is a child's way to deal with a power struggle with his/her parents. I mean, tantrums usually occur when they don't get their way -- be it can't get a toy they want, they are tired and don't want to be out and about etc. In the past (and occasionally now), I've seen parents who'd simply walk away from their child when they are having a meltdown. The child will be screaming and rolling about, chasing after their parents. I think that is not right. The child is already in an extreme emotional state and to walk away from the child is, to me, a type of emotional abandonment, that the parents can't be bothered to deal with the child. I mean, I get the logic of it, but it doesn't make it right. I've also seen screaming matches between parent and child, and even physical things like pinching and slapping. Again these are all super wrong to me :/ It's just going to traumatise the child more. What I would do is to take the child to a quieter corner somewhere and let him continue with his tantrum. In that emotional state, especially for a child, there is no reasoning. Really, there's nothing to do in the moment that will make things better. Almost anything you try will make it worse. Wait it out (crying often tires them out) and once he chills out, then you can try talking and explaining.