Just to be clear to everyone else, this isn't the reason why ToString has had a warning which became a 3 day ban due to his previous warnings.
ToString's warning is due to player harassment with sly, unneeded and trolling comments over the previous weeks which hit the tipping point last night.
As for Admins "cheating" I tried to have this discussion last night but it didn't get very far, with players jumping at each other and generally became a mess. There isn't any set Admin rules for using creative mode, we do make it clear not to use it for on other players builds and such as this gives a gameplay benefit to other players. We generally don't mind Admins using creative mode on their own builds as long as they are their own builds and not a joint project and aren't of a huge scale.
We allow this due to the amount of time Admins can lose doing admin work and such they lose a lot of game time. This also makes it far harder gathering resources as we are often needed throughout the night at different points which makes it very tedious having to continually track back down a mine. Gathering resources is generally the small percentage of play time in Minecraft, unless you are using rare mats, dims, iron, glowstone or making a massive build.
If the general consensus is players don't want Admins to use their powers on their personal builds/the odd community centered build) then it is something I will happily discuss with the other admins/FT and we can adjust our play style or bring back a creative map.
Again, this isn't the reason why ToString is banned for question authenticity of builds, it is because of his tone and attitude over the past weeks with last night being the tipping point and caused the warning.