Not sure if this is the correct spot or not, my apologies if it isn't the right spot.
The Random Teleport sign in Spawn is willing and capable of killing people by teleporting them outside of the world border.
I ended up getting lost in some giant ocean a good 9000 blocks from spawn and got spammed with a server spam that I'm outside the world border.
Lost a mid-range pick, axe, shovel and sword from Tinkers Construct.
Just a quick warning to the rest of the player base -- use caution when using it, and don't take anything super valuable with ya. :)