You guys all know ghostbuster1234, don't you? Well if you do, this is just one of the infamous tricks he does to get people to join his server. Out of curiousity, I entered his server because it was titled exactly "Ghostbuster1234's national socialist Jail RP (Not stolen)". (By the way, in case you didn't know, the actual jail build was by Incinerate).
Here's a screenshot for proof of the server being titled "Ghostbuster1234's national socialist Jail RP (Not stolen)".

Complete idiot, huh? Well, I asked him if it was his (I knew it wasn't), and he said no. Then I kept telling everyone the build was stolen and then I was perma-banned for this reason: "ITS MINE IDIOT".
If you want to have more proof, join his server when he is hosting this stolen national socialist jail RP.