With the increasing cost of policing marathon courses, I think that entry fees for big marathons such as NY should be related to how long it takes to the complete the course. Keeping roads closed and clear for 6 hours is obviously more expensive than keeping them closed for 2 hours and these unprepared marathoners are also the participants who usually require the most emergency assistance. I think the entry fee should be based on the entrants best time in the previous 2 years, half marathon equivalents can also be used.