I'm pretty sure it didn't start with me.
In fact, I'm positive I am not the originator of this thought and its example.
I bet I could even find a meme based on it.
The thought:
Commas save lives.
The example:
The simple difference between an exuberant invitation to share a meal together and a call to cannibalism.
Notice the difference a single comma can make:
"Let's eat, Grandma!" vs. "Let's eat Grandma!"
While setting off a noun-of-address with a comma (as in the above example) is a consistent rule of grammar, there's another use of commas that has become a bit of a controversy.
I speak of the Oxford comma; also known as the serial comma. It's that friendly little period-with-a-tail that appears before the word "and" when writing a list of three or more things.
Allow me to demonstrate.
There at the table sat my two ex-wives, Tom Hanks, and a large bulldog.
Clearly, there are three persons and a canine entity sitting at the table in question. But without the Oxford comma, the table only has one human and one dog, both of which I was once married to: "There at the table sat my two ex-wives, Tom Hanks and a large bulldog."
Yikes.
By the way...yes, I was able to find that meme I mentioned: