It's fascinating how advances in siege technology resemble fast Darwinian evolution until of course the bigger fish in planes and tanks come in and eat everything else up.
There is a surprising amount of money to be made in making containers for rocks, making black plastic bags for refuse and other things where you would not imagine a fortune could be made. As per the HESCO example it is a gruff Northerner with a 'where there is muck there is brass' attitude that inevitably exploits the potential. Shame about the Segway incident though.
