Many (though not all - some are too concerned about the extra weight) cyclists carry some cash with them when they go on long rides. If personal economic benefit is your main concern then why not mug a couple not too far into the course, before they've had a chance to spend it on a coffee stop?
In this light, what you call 'disruption' may be viewed as 'a steady stream of opportunities for personal gain'.
Those high-end bikes could fetch a bit on EBay.
I'm not sure what the market in used Lycra is like, though.