The reason private timberland owners have locked gates is because they tired of having plastic bags of used diapers,  all the broken appliances,  stolen cars set on fire,  and dead women's bodies dumped on their land.  Whole logging jobs are shut down for days as the investigation slowly examines the area,  and everyone who used the road gets questioned.  Easier to lock the gates,  and keep them locked,  and like in all aspects of communal life in America,  the many are unjustly penalized by the actions of the few.