Support, stop saying that mods are gonna abuse, it's not a good reason. They are mod because they are chosen for their responsibility and etc. I don't think they will abuse /v at any point.
Support. People just turn their hacks off or stop being rude and disrespectful when a moderator is online.
Wow guys what an original idea! wonder who could have thought of this! *cough* *hint* http://www.mineverse.com/threads/vanish-for-mods.91640/page-2#post-952027
Been suggested many times in the past, hopefully with enough they will change their mind and finally add it. Of course they have their reasons for it not already being implemented, but it would be very helpful at times.
There's been many suggestions on this already, however yes moderators could abuse this power. How could they abuse this? /v while pvping someone. /v when in combat. Things that should be added before we add the command /v. While in /v, you cannot attack anyone. You cannot do /v in combat. Support if these could potentially be added. ^