LOL... That shit is serious, LOL... like liquid cocaine or something.
I don't drink red bull before I hit the gym, but I have been known to have a cup of coffee a little while before I work out. I am more concerned with just pure H2O, I find that proper hydration makes the biggest impact on my workout performance.
I do like to take an N.O. booster pre workout. The best one I have taken is Super Pump 250. I don't consider any strength gains "false" while using the preworkout supps. It's more of a mental boost, which translates into better workouts. The increased blood flow does wonders for the mind, but also will have your biceps feeling like they are going to pop out of your skin, and your forearms, LOL... they get so pumped that I can't hold anything without straps, LOL.