For the third time, our sprinkler head near the curb is broken(run over) and just spewing into the street. How can I catch the people parking on our heads? We have left notes asking neighbors to be careful to not park on the grass.I think our regular neighbors are careful, but visitors, etc. aren't so much. We live on a corner so we can't always see over there if someone is parked on grass. I guess we will have the sprinkler repair guy just move the heads. I don't know what else to do.