In todays society it would seem that control line flight would gain in populairty due to the fact that no one could acuse another of having defective receiver or transmitter equipment. ( Read that as not the most expensive ).
However if one has a phiscal contact with the model that might imply liability? Perhaps that is the reason? If one is in phisical control as opposed to electronic control then they must certianly be responsible for what ever happenes as a result of their airplane being flown. Just a thought butI still will fly both and let them prove their case,,,,, if they can.