Egregious errors in spelling and grammar are all around us. This one is lurking right behind me, literally, everyday at work.
Sometimes I wonder why I don't simply change it. I could quietly create a new sign reading "Do Not Sell." I could even get a little crazy and write "Not For Sale," but I never do. Perhaps it leaves me feeling grammatically superior, or perhaps it provides me a little of the familiar in the retail job I feel oh-so-foreign at: when I feel like a fish out of water, I know how to fix this mistake. Like saving the best bite of a meal for last, maybe I am saving this edit for the moment when I can most savor it.