I don't like the idea, personally. I've seen some smoke rings that are absolutely ridiculous looking. More is not always better. You can go from a nice smoke ring to an undercured pastrami look pretty quickly. A teaspoon of TQ on a whole brisket wouldn't hurt anyone, but it's just one of those things, almost like someone getting implants to look more ripped. If you do it, use a light touch. Don't leave it on forever.