Most breaches of airport perimeters are of this sort. There is some debate about whether additional signs or lighting will keep someone stoned out of his mind from blowing through the gate or fence line. The TSA is mostly concerned with people deliberately trying to defeat security. Airport management has to be concerned with keeping the airport free of disruptions as well. There are additional enhancements that can be made, however - not that expensive either - that will keep these and other types of incidents from spilling out onto the runway.
from CTI Consulting http://con.st/9hXV6R7