You sir, are an arse. Instead of trying to belittle others, why don't you go back to what ever 'exciting' things you have to do, and I use that word very loosely.
It may not be, but there's this magical command called undo! And yes, yes it does work with WorldEdit!
Oh wait! I almost forgot to mention that you can set regions that'll only let you use WorldEdit in that area! But you obviously have very little knowledge on these things. So please, please read up on them before you try to talk down to someone who's played this game since Minecraft 4K in 2009!
As for everyone else who's given me far better answers, I'm sure I'll log in soon and say hello!
P.S. Cakeanonymous, I appreciate the support, it's a shame there's people like him on forums... But, there's always that one...