Neutral. It has been a discussion on which it could be abused or not. Like Baby stated above, it's the same thing with /god, that could also be abuse. I like the idea, yet I am worried about the ability to abuse. Good Luck!
Support. But with limitations and restrictions such as not being able to block arrows or hits, not being able to use it while in pvp or to get out of pvp (Much like how /god and /fly are), etc.
Could just disable the command in pvp zones so it can only be toggled in spawn. Vanish can be very easily restricted, so it would only be a positive change.
Support. If anyone is saying mods can abuse this, well they can abuse /god can't they so /v won't effect a lot.
They could at least let the mods have /gm 3 it works like vanish but can't be abused (not easily at least)
And ban And mute And fly Why are people so worried that mods will abuse this? Maybe pick better mods then...