I found this on the SNA site:
John Wayne Airport welcomes film, television and photography projects.
Permit fees are $400 per day for motion picture and video productions.
Permit fees are $150 per day for still photography.
Permit fees are waived for non-profit projects, with proof of non-profit status.
Security deposits, insurance and some costs for staff time are also required.
If i take my camera and shoot from the terminal, do i need this permit and will I be hassled if I don't have it?