I have done it, it was cool. Now don't let anyone else get it!
Seriously, why bother? Don't like people playing end-game content with you? I am happy more 50's come with every day.
Because it's not good for the game.
Even without rhe 2xXP weekends, it's already way too easy to level in this game and there's really too many people that reach 50 without understanding how to play PvE in a group or do warzones. The more you simplifie leveling, the less people understand their class, their role and how to behave in a group.