White Sox fan here. I realize Hawk Harrelson is a love or hate type of guy, but I think he has it dead on with his opinion of players policing themselves.
I did not see the game Friday, but heard about it, and of course read it on here.
When teams often hit players, intentional or not, sometimes a message needs to be sent. If intentional, IMO of course you need to respond. If one team each hits a batter, THEN. an ump issues a warning and you get back to playing baseball.
When a team has a habit of hitting batters (on the not intentional part), a message still needs to be sent. A pitcher needs to be in control. If he has no fear, no worry, no consequences when he repeatedly hits other batters, then the batters will get "upset," and that is when fights happen. If a pitcher on the other team hits one of his teammates, the message is sent to " be careful," to,put it nicely.
Players in the old days accepted it. In fact, I have seen many quotes of old time guys who say at least do what happened to Rizzo. Hit me in the rear where no damage happens. Then I will tell my pitcher to watch his chit.

cuz I'm tired of getting hit.
Keep in mind, none of this is of the head hunting variety. Hit a guy in the rear, maybe the ribs, and move on.