I expected him to do exactly what he did - try to prevent the run from scoring. He got hurt and it sucked, but that happens.
My Dad PLAYED in MLB for the Giants, and I thought the bellyaching and crybabying that ensued (some from Posey himself) was dead wrong.
To take that one isolated incident, and center a new rule around it was a catastrophic mistake. We see this daily within our local/state/*&^&%#@^ gubbmints - and the results are predictable.