So grieving never happens because it hardly ever happens that you get followed by a single person? Especially because you get teleported to another station or instance of this station after getting killed?
This is not only logically flawed but also a strange perspective. Would you please shift your perspective a little bit and imagine a person with a anaconda who kills 20 newbie-ships in a row - but never the same newbie twice. Is this person a griefer? A PvPer? A Ganker? What word do you have for such behaviour?
A behaviour that is nothing but destructive and gives not the slightest reward but a good feeling for ruining another players day?
That's part of the game and not necessarily griefing. Space is a dangerous place full of unsavoury characters. Remember, in the full game, such players will have to deal with a wanted status, a strong police response and bounty hunters constantly on their tail. There will be consequences to your actions in this game, but many of the game mechanics have yet to be fully implemented - this is still very much a beta (and there will be a few players out there who exploit this fact for their own "amusement").
I think it is a far more damaging to the multiplayer game if a PC killing a PC is automatically considered as griefing.