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I went through the developer blog and found that when placing fences around buildings you will already have wholes in them. It would be great if players actually had to make their way through the fence using garden secateurs or some big wrench and these wholes would stay there until a server restart or something like that. This could also be useful in chasing down players or it could tell you if these constructions have been looted recently. Secateurs could spawn in gardens, flowershops and shopping malls. Again these items could be also used to remove barbed wire, to break handcuffs and so on.