"Barbecue involves a SAUCE"

Wrong. Barbecue involves SMOKE. Let's get the terminology right, shall we?

Barbecue refers to meats that are slow-cooked (8-24 hrs) at low temperature in an enclosed smoker, using woods such as apple, cherry, mesquite etc. The meats are usually rubbed with a spice mixture, sometimes marinated, and occasionally injected with flavored liquids. They may be basted during the cooking process. Sauce is rarely used until the end of the process (brushed on right before serving, or served on the side).

Cheers,
Michael