Mycorrhizas and the Prisoner's Tilemma

Trees have many opportunities and tools to punish each other even at the root level. If your neighbor cheats by say taking more than it needs or robbing you or stealing your carbon from you how can it regulate that? There's a lot of avenues for regulating that movement just through the Mycorrhizal dynamic itself. The connections between trees are very dynamic they're constantly regressing and reforming and being severed.