I agree with seventh. People have been stupid about their bases in the past. One really good tip: Do not be stupid and build your wall right on the edge of your claimed land. Derp, that should be obvious but everybody does it.
And there are people who have no problem going after people, but then whine when they die. Think of it as a lesson. You now know you did something wrong, learn form it.
Although, seventh, from everyone's stories, you used tnt a lot. And griefed a lot.