Znaiika seriously you have no clue. Griefing to me is when a player A) Repeatedly camps someone in their safe area not letting them leave for extended periods of time, B) Kills the same player repeatedly, etc etc... Please remember this is a survival game.
So if 3 players attack me, I will try to run or fight, if they kill me I do not think I got griefed, I think I was in the wrong place at the wrong time. If I catch someone scavenging and they are in no armor and keeping light and I kill them, that is not griefing either.
Regardless of what is and is not griefing, a timer still needs to be in place.