We know the Twins got away with stuff in the 1991 World Series, but the man who broadcast the 1987 World Series thinks the Twins were messing around then too:
This is what happens when you allow baseball to be played in domes.
You’ve heard the accusation before: Fake crowd noise.
Does Al believe in Metrodome audio miracles? Yes! . . ."I’m going, wait a minute. This is a baseball game,” Michaels told the host, NBC colleague Mike Florio. “Nobody is screaming like this when the fifth inning starts. ... To me, there was no question” that the crowd noise was not natural.
This is what happens when you allow baseball to be played in domes.