I kind of fail to see why you would kill someone who does a simple /who(is) (I can't remember /userhost also throwing that server notice)
not like there is any harm in doing that. and since it doesn't have a high impact on the server if only a few people do it (since it's not a default feature), why make a problem out of it?
I'm an admin and have that mode turned on mostly to check on bots who /who(is) and /ctcp version. never went loose on a regular user doing it.