If you’re going to use signs, change them up or learn to use lip reading...or don’t use them. At least make it difficult for the other team. Sign stealing has been a part of baseball for many, many years.
It wasn’t that they were stealing signs. Everyone does or tries.
It was that they would then pound on a trash can lid in the dugout so the batter would know what pitch was coming.
“...Sign stealing has been a part of baseball for many, many years...”
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Sure it has with base runners looking in at the catcher.
But nothing like what was going on here.
A live zoom camera was secretly was mounted in center field,
with live transmission to a monitor in the clubhouse,
with analysts studying the live video feed
and relaying that information to the dugout,
with banging on trash can lids to inform the batter.