Power player idea sucks, thats sure. But the idea is not so stupid at all. As a gay above me said (ill call u whatever i want, as u wish) there is no need to give moderators a new name. /votekick should be able for every registered player.
Ill explain how I see it. First of all, vote cant be started if the player count is less than 20 or something like that. The less player count, the bigger chance of abuse. The player, who see a cheater/rulebreaker uses /votekick id. Here I dunno: maybe the information that someone voted should be posted on a global chat, maybe it should be secret. If 50% of the players will vote, then the player is kicked.
I think there should be a restriction, for eg. that we can make one vote for hour or more, so the player will think twice before voting to kick someone for hh, when hes got just hard hb.
HOWEVER, I don't really think it's very needed on LW. The anticheat systems are really good and there is ussually an admin arround. Making power players is the worst idea even, cause if admins have to choose them, itll be just an another type of mod. If they will be choosen automaticly, eg. after reaching 300 hour, there would be a lot of abusers.