ARPT MGR DRIVES HIS VAN IN FRONT OF MOVING ACFT TO BLOCK TKOF.

Narrative

AFTER SEVERAL LNDGS; THE STUDENT/PRIVATE PLT TAXIED TO THE END OF THE GRASS RWY FOR TKOF. WHILE THE ACFT WAS STILL MOVING THE ARPT MGR DROVE HIS VAN DIRECTLY IN FRONT OF THE ACFT. THE STUDENT STOPPED. THE ARPT MGR APPEARED UPSET AT OUR USE OF THE ARPT AND DEMANDED IDENT; WHICH WE REFUSED TO SHOW. THE ARPT IS PUBLIC USE; ON CHARTS; AND WE HAD NOT VIOLATED ANY LAWS. THE STUDENT AND I HAD OBSERVED OTHER ACFT USE THE ARPT SHORTLY BEFORE AND ALSO NOTICED A LOW-WING AIRPLANE PASS OVER THE ARPT AND HEAD AWAY AT LOW ALT. AFTER ARGUING A SHORT TIME; WE PUSHED THE ACFT AWAY FROM THE VAN AND TOOK OFF FROM THE REMAINING RWY. HAD WE NOT SEEN THE VAN WHILE TAXIING THERE SURELY WOULD HAVE BEEN A COLLISION AND DAMAGE. I FEEL THE ARPT MGR ACTED EXTREMELY UNSAFELY. A RADIO CALL ON CTAF; WHICH WE WERE MONITORING WOULD HAVE BEEN SUFFICIENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES HE HAS SINCE FOUND OUT THIS MGR IS A GRUMPY OLD XXXXX. HE HAS DONE SIMILAR THINGS TO OTHER INSTRUCTORS WHO BRING STUDENTS TO PRACTICE. HE APPARENTLY JUST DOES NOT WANT PRACTICE LNDGS DONE AT HIS ARPT. RPTR WENT THERE TO GIVE GRASS STRIP EXPERIENCE TO HIS STUDENT. RPTR CALLED FSDO AND WAS TOLD THAT ARPT IS NOT IN THEIR JURISDICTION. THEY DID; HOWEVER; RESEARCH TO FIND THAT THE ARPT MGR OWNS THE LAND ON WHICH THE ARPT IS BUILT. IT IS A PUBLIC USE ARPT; HOWEVER. FSDO SAYS THERE IS NOTHING THEY CAN DO. IT WAS RECOMMENDED THAT RPTR WRITE TO THE FSDO WHICH DOES HAVE JURISDICTION. ACFT WAS STOPPED 1 FT FROM THE VAN.