Mysterious Airport Gatherings

More and more randoms are flocking like sheep to the perimeters of Lux Airport.  Officials are baffled.  One offered, "I'm pretty sure its not to mark the Solstice or the beginning of Spring.  This strange phenomenon picked up sharply just after we lowered the free parking time from 30 to 15 minutes. But why?"

Drivers generally sit in a state of concentration and silence, much as if birdwatching or hunting.  Their attention is fairly evenly divided between the rear view mirror and the (generally stationary) police vehicles by the airport's main doors.

The Splice's own research revealed a slightly lower than normal level of dogging and drug dealing, hence is also at a loss for an explanation.