Had several blocks broken on my home base behind locked doors. Had a locked chest full of Lapis raided with everything gone. Also had all of my bookcases, and enchanting table stolen. Not sure what else was taken...pretty disappointed that this would happen. Screenshot below...
Fixed and the player has been expunged. I know I said this in private to you, but, it should be said for other. Guys, if you res your areas that you need or want protected, this can't happen. Also, lock your chests if they are not on a res. If you need help setting up a residence, there is a really handy wiki that Immaridel set up here: http://www.gibcraft.com/wiki/GiB_Residence_Tutorial
If you need further help, just ask for it. There is nearly always someone on that will help you!
Certainly let us know if you have questions on securing your builds. Nobody should be messing with what doesn't belong to them to begin with, but obviously that doesn't work out all the time. Oh well. In the end, you're mostly back to normal and we have weeded out a troublemaker. Back to business as usual