Careless pedestrians is alwayse a BIG problem, especially at kite festivals when you don't have your own field. At WSIKF last year my duel line's string was snapped right in half by some kid with a little single liner. Even worse, the kite then floated into iQuad's flying field (You may remember John B.). I am just happy that at all the parks in my area, there is at least a small spot for other recreational things. That is where I fly. When these clueless passer-byers invade your area, the solution is not to run the kite into them. You should be kind and solve your problems with nice cheap words.