Recently I clashed again with an editor. When I referred to one man, say Mr. Peterson, I wrote Mr. Peterson's car. When I wrote about the family's car, I wrote the Petersons' car (or the Peterson car), but when I wrote that the Petersons went to Hawaii, I did not place an apostrophe in the word Peterson.
Am I crazy or have I been wrong all my life? The editor said to write The Peterson's went to Hawaii is the grammatically correct way to write this. I hope to receive a little backup, and if somehow I've been wrong all these years, you can sue me as soon as I win the lottery. :)
In this particular book, several family names crop up a number of times, and at least she has agreed to change all these to my liking, "even though it's not grammatically correct".