I have surveyed and estimated a few timber thefts over the years. One thing that I never see mentioned is is that the mills who are buying the logs are never held accountable for their actions. FSC certification is one way to cradle-to-grave a tree, but it's expensive-ish and often impossible to prove chain-of-custody. For example, if the log truck driver isn't certified "green", the log, as sold, isn't either, regardless of the land-use management the tree was subject to during its life, nor is the lumber, regardless of the mill's policies or practices. If this chain-of-custody issue was resolved and enforced, it would be near-impossible for stolen logs to make it to market, except on the smallest scale or as finished products, which is not generally what thieves are after.