Today was a sad day for FTB Beyond, not many of you will know but 4 brave souls battled an inferno caused by carelessness with a drop of evil. attached is 8 chunks of land that was all cursed earth, and when day time hit it was chaos, the firefighters managed to put it out but battled with it for a while, eventually night time came and they were able to put it out, please be aware that fire spread is on on ftb beyond, and this could have spread across the whole world, but also during the fire fight 9 sheep 2 chickens and a cow lost their lives. so in future if your not sure if the cursed earth is contained, just ask a second opinion can never hurt.
If the chunk is not loaded cursed earth wont spread but still it's kinda griefing(act of irritating and angering people in video games through the use of destruction, construction, or social engineering, source minecraf.gamepedia)