Just slip the clutch to prevent bogging. Also protects your tranny. A clutch is waaaaaaay cheaper than a new transmission.
I've 'launched' once or twice only when it was necessary in traffic. For example, I didn't realize I had to be in the left lane for my exit and traffic was stopped except for the exit lane. Cars in exit lane going ~60-65, my lane going 0 mph. Rev'd to around 4k then let clutch out to engagement point and slipped it until the car was moving. You will smell clutch burning, but that is normal considering what you are doing.