My town set up log fencing along our trails and sidewalks. They would decay so fast, the ranger would have to drive by everyday to check the fences.

They treated the fence the same way you described. They were always tinged green. Kids would run their hand down it, on their way home. Enough kids got sick, that the town noticed.

Did they take down the rotting, poisonous fence?

Nope; everyone just knows not to touch it. They really like that “rustic” look.