At a time when we need our citizens to understand how valuable schools are and how valuable the athletic facilities are, these signs only do harm. The fields are clearly overwatered, but that is another issue, though the water is paid for by the public.
I understand there are liability issues, but the school is open, and half the time, the gates to the administration building are wide open on the weekends. I understand placing anti-skateboard devices on the low walls to protect them. I understand that at times, fields are taken advantage of, and probably sometimes people do not clean up after themselves or their animals.
But I am the principal of a school and have been for many years. I know that the good that comes from welcoming people far outweighs the damage done by a few. These signs should be replaced with welcoming signs that thank the public for their support and ask folks to care for the wonderful facilities that the public paid for.