My friend and I joined, thinking we'd get up to some fun hijinks. We read the rules on the website, and at the spawnpoint, and headed out into the wilderness to strike our claim. Wasn't long before someone in diamond armor, and quickly putting away a diamond sword, started following us. "Hi, Friends! ^." he said, but we're both paranoid, so we said pleasant hellos, and started running. He followed. "Would you like to join my base?" He said, followed by a "You have to type '/campfire <something>" to remove the build restrictions"; I'm fairly certain that's not what it does. He proceeded to follow us for 15 minutes, until our newbie protection was about to wear off. We got out of his vision on several times, and burrowed into the ground, only to find him digging behind us. Finally, as the newbie protection was very close to wearing off, I quit, hoping he'd just go away. 5 minutes later, I log back in, only to be immediately greeted with a fatal fall; He'd dug to bedrock below me. My friend narrowly avoided the same fate.

TL;DR: NixonQT is a griefer, and your server is a cool idea, but no fun.