The high school/NCAA already do this and it's generally not an issue because it's coached in to players. I prefer keeping it at that level personally as that helps them develop...by the time they get in to the NFL you would hope it has been drilled in to them as they've gone up through High School and college and they don't need to be treated like children.
However, saying that, I have no issue with it. The only time this rule will apply is if the taunting occurs whilst you're still on the field of play prior to entering the EZ.
My personal opinion is it's pretty pathetic to taunt an opponent at all, let alone taunt prior to even getting in the EZ. Therefore if you have it taken away, that's your problem.
This isn't ruining the game. It's telling adults to be...well..ADULTS.
I'm not surprised the NFL feels it needs to clamp down and build more character...maybe when players stop getting arrested every off season, the NFL might actually start to treat them like mature adults.
I don't like players pointing sarcastically with their hand/the ball at an opponent as they enter the EZ. I don't really like high stepping. It looks stupid. What Tate did was pathetic and I'd have laughed my ass off and thoroughly agreed if they'd taken the points away. Stupid individual.