By whom?

That's an honest question. Who represents the trees in human society? Do they have recognised authority?

By whom has the obligation to enforce laws in a country; Normally called the executive branch of the government. Environmental crimes are still crimes, as is damaging public property. Trees have an economic value attached. Destroying, lets say, $50,000 of public property should raise some eyebrows at least.

Unless some exceptions apply, the neighbors suffered a damage in the value of their real state. Specially if is proven than the wood was stolen and its money was pocketed by some private actor.