Grammatical Pet Peeve of the Day

Attention, writers of the English language: Please stop using declarative sentences that end with question marks. Hypothetical example:

"Hey, I thought you went on vacation?"

Unless you're actually unsure of what you thought, the proper punctuation mark is either a period or an exclamation point, depending on your level of surprise. A question mark makes no sense because that isn't a frickin' question!

That is all.