As I age I'm not as picky. People make mistakes. The most common ones: your/you're, whose/who's, they're/there/their. However, misplaced apostrophes drive me nuts. At a hotel in Pittsburgh, there was a sign that announced on Wednesdays they served "Omelet's and Turkey Sausage." I wanted to take white-out to it.
And look at this For Sale sign. There is No Way I could leave that sign as-is if that was my house! I'd be at home depot buying some white and red paint. :)
Update: Of course eagle-eyed Theo would catch that I put father and not farther/further. Darn it. See what I mean about glass houses? LOL.