Well with the instant replay, it's a rarity to see managers lose their balls over a bad call.
however I've seen more ejections this year than any other year, probably just me.
It's for the ratings. They know baseball is a dying sport and absolutely terrible so Bud Selig (Don't be fooled, "Rob Manfred" isn't actually Rob Manfred) orders specific members of a team to mix things up and start fights.