My understanding is that professional venues, i.e., NFL, NL, and other pro sports, solicit the FAA to designated the active venue as a NFZ during certain activities. Perhaps public schools can do the same?!? IDK!!! Just perhaps. For a public school system, to shut down a sport activity area, i.e., baseball field, football field, soccer field, etc., for practice, play, special use, should be a very possible viability. Any other time, the field may or may not be available for public usage. Some schools even go so far as to lock out visitors after school hours, under the guise of liability. (I envision some idiot climbing up the goal post in a football field just to hang a pair of dirty underwear.) (Then falling and trying to sue!, because it was accessible.) Some schools are also locking out as a result of having AstroTurf installed and simply wish to minimize potential damage. Now, all this locking out, in my understanding, does NOT, of course, control airspace, it controls ground level access. So, again, my understanding, unless there is a FAA sanctioned NO FLY ZONE, go for it! It also goes a long way to seek written permission from the school superintendent, school board, or other appropriate person/entity in position to grant permission (
in writing).
That wouldn't technically be an NFZ but a no takeoff/land zone (NT/LZ). The grounds can't regulate airspace.
Upon further review, I stand corrected. The map I use merely show the area over public schools as
advisory. During school hours, I would NOT be found there unless sanctioned by the school.