I've been able to kill every fuel injected bike I own by doing what you are saying. Every one.
A faster idle helps.
I dont think the answer is any different than we felt, years ago, when we had a manual choke. A computer dies it now, but the engine is still not up to operating temps and we dont have all the sensors monitoring like our cars do.
Heres hos I can kill mine, and I sometimes make a game of it. As you start the bike, its almost as if a "fast idle" kicks on. Thats fine, if the bike is sitting.
But, once you put it into motion, gearing, brakes and speed can drop the rpm. At that point, quickly closing the throttle will kill the engine.