I think this type of thing is just part of fan culture and probably has been for as long as such a thing has existed. John Lennon's rotten tooth was auctioned off for more than $30,000. Maybe years from now somebody will make a fortune selling Axl's used bandaids. Whether it's sick, wrong, or just peculiar, I don't think anybody who knows about pop culture or fan culture should be surprised by any of this.