I downloaded an audio pack that replaces all sounds with a guy's voice. Repeating command blocks summoning villages to their death, having them scream "MASHED POTATOES!" upon impact was probably the stupidest thing I've done.
started fresh on a server. got some food and went mining straight away. after a while found about 15 diamonds. dont have ender chest yet so put diamonds in a chest and buried it somewhere when no one is looking. wasn't thinking clearly and put a sign on top saying "nothing buried here" just for extra safety. returned tomorrow only to find the diamonds are gone and someone pointed out that the sign gave it away. only then realized my mistake. facepalm.