Suicide farmer? Where if ya give your animals the wrong type of food/water/etc too many times in a row, there's a chance they turn on you and kill you? Crop Dusted? Go ahead, try and water these suckers when they don't need it, or pick them prematurely. I dare ya!
Died from going AFK in a dumb place to go AFK.
That said, I think that and most others listed here could all be grouped under,
Died from player stupidity.
On a more somber note, let's treat the OP with the full respect it deserves.
It's a well-known fact that next to MWI [MMOing While Intoxicated] Distracted Typing is one of the leading causes of death in this game.