Yep, exactly, you can be a griefer by bodythrowing repeatedly. You seem to consider only a situation where player 1 kill player 2 to take the spot, and player 2 then try to defend the spot by using bodythrow. But, you can also find situation where player 1 minds his own business on a spot and player 2 decides to use bodythrow to make him leave. The griefing lies in the excess. So yeah, "Imagine in 2020 calling the person you are killing the "griefer" instead of the guy doing the killing" because you can be as much of a griefer by killing than by using bodythrow. Some personal biased players around tends to consider griefing in-game only through the act of killing, but that couldn't be more wrong, many game mechanics can be abused without any player confrontation and still cause annoyances, human nature already proved to have infinite imagination when it comes to bother others. Only a good system can reduce the annoyance.