This would not be a to tough one. Please you SSP users this is only a config setting and only something you would have to manually change. The point of this is to prevent damaging large SMP servers to much. The number one damage caused or so I have noticed so far besides really large energy loop grids haha. Is large explosions causing to many items to drop and causing 0-1 FPS for 5 minutes. I will not even dare try to explain the server impact and even more if 10 people are in the area and the servers doing updates to the client hehe.
I feel this would be great for SMP and even SSP for players who want to play a bit more hardcore but also if they have performance issues.