This is virtually universal for sales taxes in the United States -- they're all paired with "use taxes" which you're supposed to calculate and remit yourself.

This is virtually universal for sales taxes in the United States -- they're all paired with "use taxes" which you're supposed to calculate and remit yourself. It is, far and away, the least complied tax in America. People occasionally get prosecuted for it, largely when a high-dollar transaction is intentionally effected in a low-tax jurisdiction to avoid sales taxes. The canonical example is rich folks in New York buying art in Connecticut.