I don't think anyone cares when a player shows emotion generally, as long as it's not disrespectful towards anyone. I thought Misiorowski looked goofy and it was an overreaction but whatever.
Counsell was asked about PCA's emotional reactions this week and he said he doesn't care unless it creeps into his play, CC said it's a release valve for players to vent frustration, which is true. I don't have any issue with him yelling at himself. Tossing your helmet on occasion isn't a big deal, but slamming the helmet or bat on every out is childish and unprofessional, and a bad example as a role model for kids. I have no idea how he's risen through every level since Little League and no coach/ump has had him stop, nor even his parents.
The difference between PCA and Harper though is that PCA directs his anger at himself, while Harper would yell at umps and players and throw his equipment at them on occasion.