prima facile- the skinny dude riding the carbon frame rides more miles and he can afford the $15 fee but it should be a dual annual fee along with the conceal/carry license necessary for riding Deer Creek and High Grade.  While the hottie,earthy, corporate biker chick should also pay the dual annual fee as she needs to shoot at the cat callers at least twice per week and since she probably drives her Electric Vehicle to Whole Foods and doesn't currently pay gas taxes she needs to pay her fair share...there are no free lunches!  But to answer your question, does it really matter if we all just get along and carry a 9mm while riding our overly expensive carbon bikes with Dura Ace Di2?