My pet peeve is people using your when it should be the contraction you’re. I see you went to a school that taught the difference.
My pet peeve is people insrting an apostrophe in a plural word — especially a name, such as the Duncan’s. It’s either the Duncans (meaning the whole family), or the Duncans’ meaning the whole family owns something.
A handpainted sign stood at a main corner in Stafford, TX for years proclaiming “Jone’s Dirt Yard”. I never did meet Mr. Jone. He didn’t exist, of course. However, Mr. Jones delivered dirt to your house, if you paid him.