Do it! Sure, its juvenile. Sure, its hard on the car. Sure, its not what a Porsche was made for.
But it sure is fun!
I did a race with a standing start (rather than the more common rolling start). My technique consisted of rev to 4,500rpm, drop the clutch, and peg the throttle on the floor!
Be ready to counter steer a little if the rear end squirms and be ready to shift to second as soon as the rear tires hook up or you'll hit the rev limiter and lose momentum.
Its hard on the clutch, flywheel, and everything else, but its quick! (and a lot of fun).
Here is a video...