1.Place 500 tnt around their house and... BLOW IT TO SHREDS


2.When they find diamonds punch them into lava MUHAHAHAHA


3.Play the broken music disk while they're mining alone LOL


4.Make a piston trap in thier house or at thier doorstep like your friends steps on a pressure plate and piston pulls out the blocks under him and he falls in lava


5.HACK THEIR ACCOUNT MUHAHAHAHA


if you do all these you will become A TROLL! :D