Lock People Out of your town
You should be able to lock people out of your town. For example. If someone makes a town and puts a town door to keep someone from coming in and that someone just builds stairs up to the wall and into your town. My idea is that when someone tries to climb the wall and you locked them out they will just die.
I've been wanting this for ages. It's really annoying when a troll just builds stairs to get into your town. I would vote this up, but i'm down to 1 vote.