population density

[NorthernRaider]

Talking of nails on roads.
One of the local farmers up here go so fed up with thieving scrotes from the town raiding his farm vehicles for diesel came up with a wicked deterant. he got some crushed hard agrigate rock from some place that is about the size of round foundation dolomite, but rather than be soft and crushable this grey coloured rock was solid and sharp edged, he put this on the first 50 yards of the track up to where he kept his plant equipment. Any car driving up with ordinary tyres saw them shredded before they got half way, but his huge tractor tyres on his tractors were unaffected cos of their very low footprint, and his isuzu pick up he just drives through the gate then over the field without ruining the tyres. So perhaps after TSHTF some judicously broken up chunks of concrete paving stones on the road could stop most 2 and 4 wheel scavengers from getting to close to our bases.?