Forgive my chuckles. Your viewpoint sounds like you've reffed a few game in your time. However, my opinion remains unchanged. There's right and there's wrong. If it's holding it's holding. There shouldn't be a debate. And you, I, and the rest of the free world saw that Cory Webster slammed Keith to the ground to get that pick. He even hesitated on his run back because he was expecting it to be called back. The fact that the official swallowed his whistle doesn't mean it wasn't interference. It just means he didn't call it. Fast forward to 09 when Julio took a screen the distance for a TD. James Carpenter clearly blocked the guy in the back...with both hands no less. Refs just missed it or flat out didn't call it. Again, there's right and wrong. Nothing gray about any of those
They can have fun once they've crossed the goal-line and the referee has blown the whistle.
As for subjectivity, what call isn't up to a referee's interpretation?
Holding? Referees in conferences that like to throw the ball around give a much greater amount of latitude than SEC officials when it comes to holding.
Pass interference? Remember the LSU game a few years ago? Their DB grabbed our WR, slung him to the ground and then intercepted the pass along the sideline.
There are very few calls that a referee makes that don't involve some amount of subjectivity.
Make it reviewable and mandate that the officials must come to a unanimous decision that the player was indeed showboating. It's not like it's going to slow the game down because the play will have resulted in a touchdown, stopping the clock anyway. The thrust of the rule is to stop the flagrant showboating during plays. Therefore, coaches will make a point of telling kids to keep a lid on it until the whistle blows. I guarantee that if a kid does it and causes their team to lose points, he won't do it again.