Ways to troll people in minecraft?

You could turn off nametags and change into a herobrine skin. If your the host, you can make yourself invisible when they see you.

1) Place obsidian all around the spawn area. Kill them, and when they spawn back they'll be trapped.

2) Set their house on fire if its made of wood

3) Place a whole bunch of mobs around spawn so that whenever they spawn they'll keep getting killed

4) Put a lava pit under spawn

5) Whenever they go into the nether, destroy the portal

6) Be creative with tnt

Find THE END after that dig up above the black portaly part and tell them you found diamonds down there. When they go jump down they will be transported to THE END with their good stuff LOL