I think you are drowning in a glass of water pal. I would understand you if this happened in RL,but this happened in a virtual world, where both you and your wife can mute/block this resident and you won't have to deal with him anymore.
Not a satanic griefer, just a common annoying resident who crossed a line. Frying people's PCs, making a sim unbereable, that's a griefer. You just had the bad luck to run into this ahole but again, you don't have to overreact.