I would like to make a suggestion that NBT data be added to every player-placed block of wood, so that the mod can avoid applying itself to areas that players have placed.

This would have the added benefit of being able to check for this NBT tag in BlockDropsTweaker, and apply different block drops depending on whether the player chopped a tree down or just broke one of their own wood blocks. This works well in my use case because I am reducing the wood drops since my world has really huge trees and TreeChopper makes gathering wood far too quick.