It happens more often than we’d like to admit.
I got a letter illustrating this:
Subject: In my own home!
Dear Grammar Vandal,
For two years this sign has adorned our backdoor. We kept it up not as a public service but because no one bothered to take the effort to pry it off — that’s double-sided tape holding it up!
I must confess my sin: ‘Twas I who typed said sign. Forgive me. It was an oversight!
It really does happen to all of us.
Thanks for the smile.