I guess you could argue that pretty much anything a player does after he makes a big play is "taunting" under the current rule, and that's the problem. Just way too much leeway for referees to make game-altering calls with no real standards to apply and no accountability. And here's the beauty part: these are, by definition, game-changing calls because they happen only after a big play by the team that gets flagged. I mean, why else taunt, right?