Griefing in Minecraft

[Sohakmet]

It depends on what you're griefing... If you're griefing someone's hard work that took 10 days to be done and they were probably at the last part of completing it, you're simply a jackass.

If it's something as for killing other players by destroying the floor under them and making them fall under larva, or, even, planting TNT under their house so they can activate it through pressure plates, then yes, it's cool.