Manager Tony LaRussa of the A's, & Cardinals had a team rule if you hit one of ours we hit 2 of yours! Whether they thought it was intentional or not!
Bob Gibson once told his past catcher Tim McCarver when traded from the Cardinals to the Phillies if you crowd the plate when we face each other I'll "get you"! He did!
Years ago it was so much simpler if a pitcher hit a batter when HE batted later he would be thrown at and it was over! Now in the AL pitchers don't bat!
Now after a hit batter the umpire can warn both benches that the next thrown at is kicked out! So the incident festers on and on!