So, Jahona was fixing up my house from when the wither busted it all up right? I mentioned to him that someone said they had used pistons to move my blocks. Jahona stated that it was impossible to do that to someone's claimed land. So, a few weeks later, I tested that. I got someone else, gave them a sticky piston and a lever and had them place it 2 blocks away from my house. I then had them switch the lever and the piston went forward and touched my house. They then switched it again, and the piston retracted, bringing back a block with it.
So, Jahona, could you please fix this issue? I'd rather not be griefed secretly (or in any form for that matter) :P
... Well he's determined, I'll give him that.
Ok I went on and tested further. You can't push blocks into a protected region with a piston. You can use a sticky piston to pull a block out of a region. I've looked and there is currently no way to block plulling a block out of a protected region. Move your walls in by 1 and people won't be able to grab them with a sticky piston. I've checked both the protection stones plugin and WorldGuard and there is not a setting to prevent this. Sorry for misleading you but I was talking about regular pistons when we talked last. Blame notch for sticky piston mechanics.