"Due to security concerns since 9/11, the US Marines in their infinite wisdom have determined that
the number of bomb carrying bicyclists is too high so have decided to close the base to bicyclists
passing through Camp Pendleton."
Actually, it is more about controlling access than the number of "bomb carrying bicyclists." A
bicyclist could easily be used for intelligence gathering, (such as determining placement of
equipment, troop training facilities, etc.
Also, a bicycle is a fine medium for carrying some of today's explosives, which are lightweight and
pliable, and could easily be stuffed into tubing, forks, seatposts, etc.
So, the Marine Corps actually has displayed wisdom. Sorry if national security hinders your
recreation.