So whats the acutal advantage of having a higher BB? The only thing i can think of is that you'll be able to pull up your bike further, giving your backside more space, but by the looks of things, its actualy peoples legs squashing up thats stopping them from pulling the bike higher.
I can think of pleanty of disadvantages, like you'll have a higher center of gravity, which will effect gerneral balance, but can't think of any advantages... :D