um... i would say neutral.
Having this function will give player more momentum grinding the leaderboard, and leaderboard player won't get target that much easy.
But trytohit me has pointed out, that is a function of taitan, and hard to check it. um, so neutral for this. But i need to say it is a good idea, especially later on the chat will appears you level, which makes higher level player can't talk or scared to do it.
If there is this function, should add one more is that the "level nick" which means that player can nick their level to lower once