Rickair--
Unfortunately, 18 USC 32 applies only to the "special aircraft jurisdiction of the United States" which, in a nutshell, requires the aircraft to be in flight, not on the ground. 18 USC 31 says to look to 49 USC 46501 for term definitions used in the chapter that sections 31 and 32 are in (Title 18, Part I, Chapter 2). 49 USC 46501(2) defines "special aircraft jurisdiction of the US".
(2) “special aircraft jurisdiction of the United States” includes any of the following aircraft in flight: (A) a civil aircraft of the United States.
(B) an aircraft of the armed forces of the United States.
(C) another aircraft in the United States.
(D) another aircraft outside the United States— (i) that has its next scheduled destination or last place of departure in the United States, if the aircraft next lands in the United States;
(ii) on which an individual commits an offense (as defined in the Convention for the Suppression of Unlawful Seizure of Aircraft) if the aircraft lands in the United States with the individual still on the aircraft; or
(iii) against which an individual commits an offense (as defined in subsection (d) or (e) of article I, section I of the Convention for the Suppression of Unlawful Acts against the Safety of Civil Aviation) if the aircraft lands in the United States with the individual still on the aircraft.
(E) any other aircraft leased without crew to a lessee whose principal place of business is in the United States or, if the lessee does not have a principal place of business, whose permanent residence is in the United States.
Anyway, enough of the legal mumbo jumbo, there's probably another federal law out there that applies. In any case, there are certainly state criminal laws that would apply. Besides an anonymous complaint to the FBI, one could also consider an anonymous complaint to a state-level law enforcement agency, or even to that state's department of aviation or aeronautics.