other ghastly contextual errors

This is from my friend Laurie, who is even more of a word and grammar hound than I am. From a sign at a mall:

Washrooms closed due to construction. Please use food court.

Um, really?

Errors like this often happen when we write as we speak, trying to use as few words as possible, and don't take the time to proofread well. You most often see these errors on signs, although you can also find them in newspaper headlines from time to time.