That would be fine, but in general leagues have been less willing to dish out a 6 digit fine for something like this.
That's where the human element comes in too, because it's generally subjective. Who would want anyone the responsibility for giving Lebron a 100K fine because it looked like he flopped.
Like I said, refs should just take a "fool me once shame on you," If Lebron gets trucked over and doesn't get the call a couple times, he'll get the message.