Griefer

Mob armies are one way griefers attack players. Mostly when players are in villagers. So to prevent this from happening you must build snow and iron golems all over the village. Then make a hole in the house you stay in so you can hide. When they come hide and crouch using shift and place a wooden plank above you. If he is a greefer that kills for items break cobblestone two over and drop your items there and cover them up. You might die but at least the griefer doesn't get what he wants. So if you have a griefer problem tell me about it and I'll help you fix it.