I'm pretty sure that was an option before the latest update. Would be great to have it back.

What would be the purpose ?

As far as I remember that was part of the old version.
Raid Block and Combat Block blocks different things like TP, kits, fast building with BGrade and other stuff, up to what was set in the No Escape-plugin.
It activates when someone does damage to a building or player.
It would be good if this was ignored like before to not take all the named options from the admin.
For me the vanish mode is for admins to be ignored, by players and game options that restrict him.
Please put it in the plugin again.
Thank you.

Why would an admin damage buildings in vanish ? 

For example to test different settings of damage to different kinds of walls.
Or of course do the same with persons/moderators.
I got many plugins that need testing from time to time and some have to do with destroying things cause it's Rust. :D
And it's annoying if e.g. I can't use kits after cause I have to wait til the raid or combat block timer is finished.