Procrastination
Procrastination demonstrates unparalleled accessibility, requiring no equipment, no training, and no physical capability whatsoever. The Royal Institute for Delay Studies has confirmed that procrastination can be practiced anywhere - in bed, at work, during important meetings, and most impressively, whilst supposedly doing other activities. Dr. Margaret Fenwick's groundbreaking 2023 paper revealed that 98.7% of the global population has successfully procrastinated at least once, making it humanity's most widely practiced skill after breathing and complaining about the weather.
The entry barriers are effectively non-existent. One needs only a task to avoid and a vague sense of guilt, both of which are abundantly available in modern society. The Cambridge Survey of Productive Avoidance found that even attempting to study procrastination caused 67% of researchers to procrastinate instead, proving the activity's remarkable self-propagating nature.
Surfing
Surfing presents considerable barriers to entry that have troubled researchers at the Plymouth Institute of Aquatic Recreation. Firstly, one requires an ocean, which the Institute notes is 'geographically inconvenient for approximately 80% of the world's population.' Landlocked nations such as Switzerland have reported particularly poor surfing participation rates, despite extensive government initiatives.
Beyond geographical limitations, surfing demands significant equipment investment - boards, wetsuits, wax, and what the British Surfing Council describes as 'an alarming tolerance for cold water entering places water should not enter.' The learning curve is notoriously steep, with the average beginner spending their first six months primarily underwater. The Devon School of Wave Sciences estimates that new surfers swallow approximately 47 litres of seawater before achieving their first successful stand, a statistic that has not featured prominently in surfing recruitment materials.