I had an issue last year at the kite festival in OC Marlyland where there were a few of us set up in the middle of the beach under some of the big infaltables, and we ahd been there all day flying. One of the lifeguards riding a fourwheeler drove into the flying area, and was warned to not continue due to the hazard in front of him. He ignored the warning and raced ahead, becomming ensnared by the lines to my kite. After 10 minutes of untangling the lifeguard and four wheeler from my lines, the lifeguard raced away without even a trace of an apology. I spent the next hour salvaging my lines.